Bungie has really dug their heels in and still are not allowing users to play destiny 2 on the steam deck. You can technically still play it via stadia as it's an approved media. But for some reason many months after the launch of arguably the device that's bringing mobile gaming back bungie still will not allow you to play the game via steam. This means that you would have to buy all of your DLC content again on stadia just to be able to play most of what you have already paid for. Or bungie could at the very least either not ban players who attempt to play the game on linux or find a suitable Linux anticheat.