In Mint most people recommend installing Steam directly from the website as .deb. There are dozens of informative threads on the official forums, which also explain some differences of the installation method, for example: https://forums.linuxmint.com/viewtopic.php?t=427582
Also Valve’s guide on how to use Steam with an NTFS disk (which I assume you’re using) can be found here: https://github.com/ValveSoftware/Proton/wiki/Using-a-NTFS-disk-with-Linux-and-Windows
And how is that relevant in a post about “Linux Mint and Steam”?