Welcome to the community, @Stefano_Pianelli! :grinning_face_with_big_eyes: Other blocks cannot be nested inside a Page Designer layout. Only text, images, and table fields are allowed. You might consider making a request in the Product Suggestions category if you feel this would be a useful feature to add.

Thank you @Justin_Barrett. I’m opening a thread in Prod Sugg right now.

Stefano