Welp thank you for the advice, i will definetly look into that.
Edit: i found a comment by a reddit user saying this:
If you add the shortcut or the exe file to the library, Steam will not spy on you and ban you for using whatever you’re using.
If you’re adding a third-party/non-Steam game then it doesn’t matter because Steam system will see it differently (those games are not recognized as owned or anything similar to that in Steam, because they come from outside of Steam).
For example I have several pirate GOG games in Steam and those work differently than the games I bought on the Steam store or added to my library through the Steam store (those just work differently, Steam just sees it as an extension/shortcut/hub and does not see it the same way as a bought game in Steam).
So i think i’m free to add pirated games as non steam games on the platform, right?