I just had to tweak the permissions for MobilePay, I cannot remember exactly which, but I think it was something about allowing it to use the Play Store integrity layer? It was a quick fix in any case, and they have some advice on the Graphene site.
For banking Revolut works with no issues. I have not tried my main bank, I never use their app, always do my banking on my laptop anyway.
Good luck. I switched a long while back now, and I love it. I went back to using a phone cover with space for a physical payment card, and I honesty never miss having Google Pay.
There were a couple of other items specific to Denmark that I had issues with, one I solved and it now works (MobilePay), the other I replaced with a dongle (MitID). Outside of those two, everything else worked flawlessly from the start.
There is a lot more control available to you, and I’ve found the settings and user experience very easy to figure out.
If you mean you can’t get the lion guy out of the campsite, then I think it may be because you have to invite the first campsite visitor to live on your island. He might stay there till you do.