IPv6 is automatic mostly over LAN or wireless. IF IPv6 is setup on the XR router then it populates to both wired and wireless devices if they support IPv6.
My Setup (Cable 900Mbps/50Mbps)>CM1100>Orbi RBK50 v2.5.1.16 and Orbi RBK853 v3.2.15.25(Both Router Mode) Additional NG HW: C7800/CM1100/CM1200, Orbi CBK40, Orbi RBK852, R7800, R7960P, EX7500/EX7700, XR450 and WNHDE111
I have ipv6 setup and it's on but only on the lan if I use wifi it just uses ipv4. I cant use the wired connection since the port shuts off and restarts randomly and my nat type goes from open to unavailable. But using wifi it works. I must have a lemon router cause it has tons that is wrong with it. I spend more time fixing it that actually playing.
QoS will work better for IPv4 if you need it. I don't think IPv4 will be the cause of that. Do you have your ISP router in modem mode or the XR500 in it's DMZ? If using the Geo-Filter have you added your friends to your allow list so you can connect with them despite your settings?
