CDS Object Page with Attachment functionality

Hi Experts,

I am new to CDS view development, I created CDS view and exposed as OData service through annotations.

created facet for object page tabs. i want to add uploadcollection UI element in object page and save in GOS.

could you please share details or info on how to add new UI elements in object page in CDS.

Advance thanks and Happy new year.

Regards,

Srinivasu Y