"Submit for Review" no check for required SCF fields

Hi!

I noticed that when a user submits a custom post type post for approval (using the "Submit for Review" button), there’s no validation for required SCF fields.

Let me explain:

1. I created the Events post type via SCF and defined custom capabilities for it (e.g. edit_events, etc.).
2. I created a new role, removed all default capabilities, and added read and edit_events. Users with this role can now create Event posts.
3. These users cannot publish posts – they can only submit them for review. Everything works fine in general, but when a user clicks “Submit for Review” no check is performed for required SCF fields. As a result, posts can be submitted without completing mandatory fields.

Reproduce the custom post type workflow with required SCF fields and a role that can submit posts for review but not publish them. Start by tracing the “Submit for Review” handling and required-field validation; done means submission is blocked until mandatory SCF fields are completed.