Can Gog games play multiplayer with Steam players??

like No man Sky and stardew valley Etc

Thanks!

Gog calls that "crossplay." I don't see where or if they announce that on the game pages, so I have to look it up.

https://stardewvalleywiki.com/Multiplayer

This says stardew valley does have crossplay. So you're good there.

The gog game page for no man's sky say it does not have any multiplayer at all.