Two questions, notifications not working and swapping phones

My smartthings app has for some reason stopped sending me push notifications for events it’s supposed to notify me of. I setup a test notify me when for some lights, it was delayed, but worked. But all my previously assigned ones don’t fire off?

2nd question, I switched phones a few weeks back (well before the above issue started, so not related) and found that the only way to swap phones in smartthings is by removing EVERYTHING that phone is tied to or associated in anyway with (which in my case is A LOT). Real PITA. Is there an easier way to swap phones in the app? I switch phones often, so praying there is an easier way.