If you mean on Holiday theme there are Yuletide and winter. These are different but still christmassy.
You can turn off the Sound or Ambiance volume. I think it’s Ambiance.
There are a few different Christmas settings. You’re probably referring to Holiday. If you want to change it to Yuletide or Winter you can in the Shop. It costs 1499 coins to buy. You can preview.
You can turn off notifications in Settings.
It says “Your record vs ________” when you look at another person’s profile.
With one on one games there is a thumbs up button that is part of chats. If a person does the “great look” button they will see that the person has another like from them. If you don’t see that change you have probably already liked their chum.