one by one on protondb.com

I found this:

https://www.lorenzostanco.com/lab/steam

But the info doesn't look very accurate.

Protondb. You can log in to your Steam account on it, then filter all your games by ProtonDB rating.

引用自 Omega：

Protondb. You can log in to your Steam account on it, then filter all your games by ProtonDB rating.

^ this. ProtonDB is the source (beyond Valve's own Steam Deck verified page).

Go to protondb.com
Click the user icon in the top right corner
Login via the Valve Steam API; or if your Steam Profile is public you can just input your profile ID

Once you've done that you'll have a filtered list of your games and their protondb rating/compatibility