The mode to turn off the user interface (UI) for Farming Simulator 22 has already been released. While playing FS 22 with the Hud Hider mod, you can hide the user interface and take better photos or increase the realism.
You can hide the UI with Left Alt + H keys.
How to install?
Install to Documents/MyGames/FarmingSimulator22/mods
Start the game: You can activate in mod manager of your profile.