I'm a Fedora 36 user, and I had the same problem and also read the other thread.
Patching an installed library seemed a bit extreme to me, and I already happened to have the libserialport-0.1.1-13.fc36.x86_64 package installed on my system. Simply deleting the libserialport.so.0 bundled with the Mirror app solved my connection problem.
My user was already a member of the dialout group for serial port access.