Yes, The new allow_null setting would allow a user to unselect a radio field input. This is normally not allowed by a browser and is the main reason why a few other developers are saying a radio field should not allow null (because you can’t unselect a value).
I’m happy to add in this new setting, it makes sense from all angles!
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users