Over 17 Million Hours of Baldur's Gate 3 on Steam Deck - Steam Deck HQ
steamdeckhq.com
It was confirmed that there's a total of over 17 million hours played of Baldur's Gate 3 on Steam Deck.

Here’s the original source, a tweet from Very AFK who is a Larian dev.

Over 17,223,529 hours of Baldur’s Gate 3 has been played on Steam Deck. We should partner with someone to do a special edition 100w battery. A little bag of holding, you know, for ur juice.