The heroic launcher is the way to go here. It installs the games in desktop mode and automatically adds them to steam. Compatibility is, for me, the same as if I had installed through steam.
Edit: assumed I was on a steam deck post. On desktop I also use heroic, again, compatibility is great. There’s a checkbox to add to steam automatically if you want.
All good points in the comments, but something I haven’t seen a anyone talk about yet:
WHY is a DISK DRIVE $80??? All it does is read a disk. Any encryption on the disk would be decrypted on the console. External disk drives are like $20. If you specially brand them maybe you could go up to $40.
But $80? That’s like a Gameboy Advance. That’s a miyoo mini plus. That’s an entire console in itself.