Rigid components with lots of legs, aren’t the easiest thing to desolder.
You’ll want a good iron, suction pump and solder wick, and you’ll have to be careful not to over heat the tracks and damage anything.
You also need to ensure everything is grounded to the case, there isn’t a lot of voltage in there, but schiit uses AC adapters and rectifies in the box, so if you don’t ground it there is a good chance you’ll end up with ground noise.
You’d probably need a new panel mounted headphone jack.
If you damage the pot it’s not an off the shelf part Schiit has them custom made by Alps, so you’d brick the amp unless you could find a replacement. If the box is bigger you might be able to fit a 24mm one.
It’ not terribly difficult to do, but you need to pay attention to the details.
You may also have issues if you desolder the pot, part of the rigidity is the mounting to the board, and there is a good chance the nut that mounts it to the panel could work lose with use.