Hi motel hotel ,
unfortunately, i never got Thunderbolt working to this day and to be honest, I never bothered anymore.
Thunderbolt on hackbooks is glitchy at best.
Any other external monitor solution is problematic as well because, e.g., the hdmi port is directly connected to the nvidia gpu - which is disabled because of missing drivers in macos and to therefore save battery.
Sorry for the bad news.
cheers