Hi again ! While I was struggling to upload a linux build (itchio doesn't seem to like the extension), I noticed a renpy statement "PC : windows and linux."
Could you try to run the 1.7 PC build (the second one) to see if it works properly on linux ? I can't check myself >.<
If so I will just add the linux icon to it so people can see they can use it directly on linux !
EDIT : I also managed to add the linux special, but I don't know which one is the best tho.