With newer Wifi 6 routers from TP-Link, IPv6 support via tunnel may be possible. Since the tunnel is established via a third-party provider, no guarantee can be given with regard to functionality.
Under certain circumstances the connection can be slower than with native connections of the tested ASUS router.
Go to Advanced.
Select IPv6 and apply the settings for IPv6 Internet and IPv6 LAN like shown in the screenshot: