Is there a way to move records from one form to another in the same document, if they have identical fields?
There’s no function for that. Two forms would not have the same fields even if the names are the same because they have different internal Field IDs. So they’re technically not the same fields.
You can however duplicate a form on the Mac version and have Tap Forms also duplicate the records.
But sometimes people use different forms where really they just need to create one or more Saved Search to filter their records instead of manually trying to manage copying records from one form to another.