Not all columns that are supported in a table support the display of a quick view.

For the currency, no referential constraint is defined by the service. This is why you need to make the following entry:
<Association Name="assoc_6D52161C1362D99A31996E5BB23202E8" sap:content-version="1">
<End Type="STTA_PROD_MAN.STTA_C_MP_ProductSalesDataType" Multiplicity="1" Role="FromRole_assoc_6D52161C1362D99A31996E5BB23202E8"/>
<End Type="STTA_PROD_MAN.I_CurrencyType" Multiplicity="0..1" Role="ToRole_assoc_6D52161C1362D99A31996E5BB23202E8"/>
<ReferentialConstraint>
<Principal Role="FromRole_assoc_6D52161C1362D99A31996E5BB23202E8">
<PropertyRef Name="Currency"/>
</Principal>
<Dependent Role="ToRole_assoc_6D52161C1362D99A31996E5BB23202E8">
<PropertyRef Name="Currency"/>
</Dependent>
</ReferentialConstraint>
</Association>
Quick view facets annotation:
<!-- QuickViewFacets annotation for Currency-->
<Annotations Target="STTA_PROD_MAN.STTA_C_MP_ProductSalesDataType/Currency">
<Annotation Term="Common.SemanticObject" String="EPMProduct"/>
</Annotations>
<Annotations Target="STTA_PROD_MAN.I_CurrencyType">
<Annotation Term="UI.QuickViewFacets">
<Collection>
<Record Type="UI.ReferenceFacet">
<PropertyValue Property="Target" AnnotationPath="@UI.FieldGroup#CurrencyQuickViewPOC_FieldGroup_1" />
</Record>
</Collection>
</Annotation>
<Annotation Term="UI.FieldGroup" Qualifier="CurrencyQuickViewPOC_FieldGroup_1">
<Record>
<PropertyValue Property="Data">
<Collection>
<Record Type="UI.DataField">
<PropertyValue Property="Label" String="Decimals" />
<PropertyValue Property="Value" Path="Decimals"/>
</Record>
<Record Type="UI.DataField">
<PropertyValue Property="Label" String="CurrencyISOCode" />
<PropertyValue Property="Value" Path="CurrencyISOCode"/>
</Record>
<Record Type="UI.DataField">
<PropertyValue Property="Label" String="AlternativeCurrencyKey" />
<PropertyValue Property="Value" Path="AlternativeCurrencyKey"/>
</Record>
</Collection>
</PropertyValue>
</Record>
</Annotation>
</Annotations>
QuickViewFacets annotation for Supplier

<!-- QuickViewFacets annotation for Supplier-->
<Annotations Target="STTA_PROD_MAN.STTA_C_MP_SupplierType/EmailAddress" xmlns="http://docs.oasis-open.org/odata/ns/edm">
<Annotation Term="com.sap.vocabularies.Communication.v1.IsEmailAddress" Bool="true"/>
</Annotations>
<Annotations Target="STTA_PROD_MAN.STTA_C_MP_SupplierType/URL" xmlns="http://docs.oasis-open.org/odata/ns/edm">
<Annotation Term="Org.OData.Core.V1.IsUrl" Bool="true"/>
</Annotations>
<Annotations Target="STTA_PROD_MAN.STTA_C_MP_SupplierType/PhoneNumber" xmlns="http://docs.oasis-open.org/odata/ns/edm">
<Annotation Term="com.sap.vocabularies.Communication.v1.IsPhoneNumber" Bool="true"/>
</Annotations>
<Annotations Target="STTA_PROD_MAN.STTA_C_MP_SupplierType">
<Annotation Term="UI.QuickViewFacets">
<Collection>
<Record Type="UI.ReferenceFacet">
<PropertyValue Property="Target" AnnotationPath="@UI.FieldGroup#SupplierQuickViewPOC_FieldGroup_1" />
</Record>
<Record Type="UI.ReferenceFacet">
<PropertyValue Property="Target" AnnotationPath="@UI.FieldGroup#SupplierQuickViewPOC_FieldGroup_2" />
</Record>
</Collection>
</Annotation>
<Annotation Term="UI.FieldGroup" Qualifier="SupplierQuickViewPOC_FieldGroup_1">
<Record>
<PropertyValue Property="Label" String="The first field group label" />
<PropertyValue Property="Data">
<Collection>
<Record Type="UI.DataField">
<PropertyValue Property="Label" String="Supplier" />
<PropertyValue Property="Value" Path="Supplier"/>
</Record>
<Record Type="UI.DataField">
<PropertyValue Property="Label" String="Company Name" />
<PropertyValue Property="Value" Path="CompanyName"/>
</Record>
<Record Type="UI.DataField">
<PropertyValue Property="Label" String="Email Address" />
<PropertyValue Property="Value" Path="EmailAddress"/>
</Record>
<Record Type="UI.DataField">
<PropertyValue Property="Label" String="to_Address / FormattedAddress" />
<PropertyValue Property="Value" Path="to_Address/FormattedAddress"/>
</Record>
</Collection>
</PropertyValue>
</Record>
</Annotation>
<Annotation Term="UI.FieldGroup" Qualifier="SupplierQuickViewPOC_FieldGroup_2">
<Record>
<PropertyValue Property="Label" String="The second field group label" />
<PropertyValue Property="Data">
<Collection>
<Record Type="UI.DataField">
<PropertyValue Property="Label" String="Phone Number" />
<PropertyValue Property="Value" Path="PhoneNumber"/>
</Record>
<Record Type="UI.DataField">
<PropertyValue Property="Label" String="URL" />
<PropertyValue Property="Value" Path="URL"/>
</Record>
<Record Type="UI.DataField">
<PropertyValue Property="Label" String="to_Address / AddressValidityStartDate" />
<PropertyValue Property="Value" Path="to_Address/AddressValidityStartDate"/>
</Record>
</Collection>
</PropertyValue>
</Record>
</Annotation>
</Annotations>

<Annotation Term="UI.QuickViewFacets">
<Collection>
<Record Type="UI.ReferenceFacet">
<PropertyValue Property="Label" String="Label FieldGroup 1"/>
<PropertyValue Property="Target" AnnotationPath="@UI.FieldGroup#SoldToQuickView"/>
</Record>
<Record Type="UI.ReferenceFacet">
<PropertyValue Property="Label" String="Label FieldGroup 2"/>
<PropertyValue Property="Target" AnnotationPath="@UI.FieldGroup#QVFacet"/>
</Record>
</Collection>
</Annotation>
<Annotation Term="UI.FieldGroup" Qualifier="SoldToQuickView">
<Record Type="UI.FieldGroupType">
<PropertyValue Property="Data">
<Collection>
<Record Type="UI.DataField">
<PropertyValue Property="Value" Path="PostalCode"/>
</Record>
<Record Type="UI.DataField">
<PropertyValue Property="Value" Path="CityName"/>
</Record>
</Collection>
</PropertyValue>
</Record>
</Annotation>
<Annotation Term="UI.FieldGroup" Qualifier="QVFacet">
<Record Type="UI.FieldGroupType">
<PropertyValue Property="Data">
<Collection>
<Record Type="UI.DataField">
<PropertyValue Property="Value" Path="Country"/>
</Record>
</Collection>
</PropertyValue>
</Record>
</Annotation>