Add "add_post_type_support" options when extending builtin post types

[stefanobartoletti]

Would it be possible to add "add_post_type_support" options when extending builtin post types?

Just as an example, to add the Excerpt to Pages.

I see that a "Supports" section is available under the "Advanced options" tab when creating a custom post type.

Would it be possible to add this even when extending builtin post types?

[quasel]

Never thought about that, but as the CPT is already registered but maybe I'm overthinking that and there is an easy and quick filter @sc0ttkclark ?