

It will just make sure Proton tells the game your display supports HDR, you’ll probably still need to enable it in game, unless the game uses it by default.
The Wayland flag tells Proton to use Wayland natively instead of xwayland, so you do still need it.
You can remove most apps using ADB. Universal Android Debloater is helpful for this, just make sure you read the comments for each app so you dont remove something you need.