You are streching content with it it’s not proper 16:10 but i still use it in Sonic Frontiers and DBZ Kakarot because there is no way to mod it in 16:10
I have an annoying FPS issue right now (it’s not GPU/CPU Lock) every game run slower. I tried Factory Reset but didn’t work. I bought it 1 year ago On eBay so no RMA. So I think will buy it
Get Steam Deck essentials mod to get your stable 30 fps