How could I use Lutris's proton on steam?

So Lutris is able to run games steam can’t because my drives I store everything on are NTFS (I can’t change that at this point in time) and steam doesn’t run some games if they’re on NTFS. My boot drive is Ext4 however the game I have is too big to put on there so I’m curious if it would be possible to allow steam to run my games like lutris does so I can play online. I’ve tried installing GE-Proton8-6 and using that since I noticed lutris uses what I assume is a modified version of that but it didn’t work.