I am curious if I can share software/games installation on SD Card between PC and Deck. I am not asking about technical details, but if you can describe it, I will be thankfully. I am asking rather about law implications.

So:
I bought Steam Deck and wait for a package. I have games/stores installed on SD Card on my PC. I think, I could install lutris on Deck via flathub, add permission to SD Card by /run/media/$USER/DRIVE_ID and search for games. Also, I could copy some files from ~/.local and ~/.config or scan folder for search for games. This could bring me possibility to play on Epic Games installation both on Steam Deck and PC. It is legal? I known, that it is much harder to do if I talk about Steam, because Steam saves PC id inside game library (as for as I think).

Thanks for response.