Fucking. Preach.

Just so you know you can fix EA games on the Steam Deck by logging into EA with your steam account and linking it. All the EA launcher games will work again.

Go to EAs help page. https://help.ea.com/en/contact-us/ Click login, and choose the Steam option. Link your steam with your ea account. Then try launching your game again. You’ll get the gray screen but give it time and it will go away.