Game Booster just got an update 2 days ago. Go to your Galaxy Store and type in the name of the app. Game Booster should already installed in your apps. Just go to settings and go down to apps. Go into apps and it should be there. It might be disabled so try and open Game Booster and enable. You'll probably have to grant or regret permissions. If that doesn't work , you might want to restart your phone to reboot. I myself have a Note 20. Hope this helps, have a great gaming experience.