This page is our investigation of cross-play game Deep Rock Galactic. We always verify information manually using official sources - no AI.
Deep Rock Galactic supports cross-play, but not between every platform. This limitation can usually create confusion, so we will explain everything in detail.
Deep Rock Galactic supports cross-generation cross-play between PlayStation 4 and PlayStation 5, as confirmed by a Steam news post from the developers at the PlayStation release in 2021. [source]

On the official Deep Rock Galactic website, we found a confirmation that the game has cross-play between Xbox One, Xbox Series X|S, and PC (via only the Xbox Game Store for PC). [source]

I want to highlight that Deep Rock Galactic does NOT support cross-play between any console and Steam. This is bad news, as Steam remains the best platform for PC gaming, but it is a very common issue for games on Xbox.
You cannot turn cross-play on or off, as it is on by default.