We have several types, where we need to be sure some fields are not empty. It would be great if we can mark fields as required OR create a validation rule if fields are empty (display an error message).
You could create a formula field that checks for empty fields, and returns a clear message:
if(IsEmpty(Name),"❗ Name needed ❗","")
You can then also create a view that lists the entities that need attention.
You could create automation rule(s) that notifies the Created-by person (or Assigned-to person) if fields are empty (on creation and/or whenever there is an update)
A bunch of related prior discussion of required fields, both in and outside the context of a “form view”: