Infinity '25 introduced the ability to manage embedded pages in CRUD. https://docs.pega.com/bundle/platform/page/platform/data-integration/introducing-crud.html#ref-introducing-crud__section_ikf_1yw_y2c_title
and a DSS to support it Managing data objects with nested data structures in Constellation (important DSS!)
I am unsure if this is possible in '24 from CRUD directly, you may have to use a case to do it. However, I’m investigating if the changes made in '25 can be locally introduced. My initial thoughts are this is at the DX API level, so no, but will find out.