Have you tried updating all your apps via Google Play Store and your Galaxy store Sleepyhead69?. Many need to be bang up to date to run Android 12 properly. It is best to clear your cache partition after every software update too. Even before updating your apps.
I would not give up hope as some developers may be a little slow in making their apps fully compatible. Hopefully your problems will be sorted when your problem apps are updated soon. It is always a bummer when system updates cause problems though. Especially such a much anticipated one.