Business profile edit just spins forever after I hit confirm

If it's still not showing after a day, look at the profile from the dashboard. Some edits, mainly the name, category or address, go through a longer review and can even trigger re-verification. Changing lots of fields at once makes that more likely, so do one change, wait for it to go live, then the next.

Try incognito with extensions off, or the Maps app. And stop pressing confirm, refresh in a few minutes instead. It has usually gone through and is just pending review.