A new SteamOS Beta update was released to fix the performance overlay not appearing when trying to play Baldur's Gate 3 after the native #SteamDeck build update:

https://steamdeckhq.com/a-new-steamos-beta-update-was-released-to-fix-performance-overlay-for-baldurs-gate-3/?utm_source=dlvr.it&utm_medium=mastodon