I agree that this is not a feature of new forms and it is a feature that would be nice to have. If you were so inclined, you could put in feedback and maybe other people will vote on that as well. But meanwhile "don't let the things you cannot do stop you from doing the things that you can".
I can see that you're just trying to update a field probably set to "Log Changes" for a down and dirty tracking of the previous statuses, including when and by who.
I suggest that you set up a simple Pipeline that will trigger on a change of that field and would update your logged field. So basically just have the pipeline do what the form rule would have done.