Apparently so it does, and it says “HDMI Freesync” rather than “HDMI [2.1] VRR”. FreeSync HDMI is a completely different protocol and is supposed to work under Linux. Found a thread here, can you try cat /sys/kernel/debug/dri/0/HDMI-A-1/vrr_range
and edid-decode < /sys/class/drm/card0-HDMI-A-1/edid
? Though there is no solution there.
Yes, using KDE Connect, which has had this functionality for ages. Though you’re best off using the F-Droid version since Google has severely limited the Play Store version using SAF. Seems like they’ve they’ve given Microsoft a pass here even though they’ve blocked KDE Connect from doing the exact same thing for years.