I’m using Nobara and I can’t seem to find a way to download surf shark. They have a terminal command that installs it automatically, but it’s a .deb file. I’m pretty sure Nobara is fedora. I don’t think I can use that.
Based on How to set up Surfshark on Linux – Surfshark Customer Support, only a few distributions are officially supported. The distribution you are using is not one of them.
However, there is apparently a snap version (Install Surfshark VPN — safe & private online on Fedora using the Snap Store | Snapcraft). With a bit of luck, this will also work under Nobara as this distribution is apparently based on Fedora.