How to find/delete non-steam games installed through Proton? (HELP)

Hi,

I wanted to install League of Legends on steam deck to give it a try but of course its not available through steam. So, I downloaded a windows installer for LoL, added it as non-steam game and started/installed it using Proton Experimental. The game was installed and the launcher downloaded additional updates, however I cant find the install location anywhere on steam deck on desktop mode.

When I launch the LoL installer again through gaming mode the install page comes up again but instead it checks the game files and brings me to game launcher menu. The game doesnt start and keeps crashing so i want to delete it but I cant find the game files on my deck anywhere.

In short: when i launch installer again the usual install location is set to: Desktop/My Computer/C/Riot Games/League of Legends. Can anyone please help me access/find the files so I can delete it?