The Samsung Galaxy S9 has an app that organizes your games and gives you various functions such as a screen recording. We are talking about the so called "Game Launcher".
If this is not yet activated on your Samsung Galaxy S9 and you would like to use it, please proceed as follows:
Activating Game Launcher on the Samsung Galaxy S9
1. From the Home screen, open the App menu and then the Settings
2. Now select "Advanced Functions" and then "Games" in the next submenu
3. You will now see the "Game Launcher" function - Activate it by setting the slider to "Active" - Done!
You can now use the Game Launcher and all its functions on the Samsung Galaxy S9.