If they upgraded to Wayland they would have to rework their streaming protocol to function with Wayland and probably several other things need to be reworked. I use plasma 6 with Wayland on my endeavor install, but I still can’t use discord streaming or steam in home streaming without problems. The x11 to Wayland video bridge by the kde devs isn’t even updated to work properly.
I use an Anker USB hub with power delivery and it’s completely hot swappable, I would be incredibly surprised if the official dock wasn’t.