To the community - this is now solved - the modem needed to be set to non-AX mode since the dongle does not handle the later protocol... Thanks to TP-Link for their efforts. I was most impressed....

@Solla-topee Hi there again > Thank you for the update, can login to router and share a photo of the 2.4Ghz WiFi settings? < > You could create a Guest WiFi on the new router and see if adapter could...

Hi there Thanks for your reply. I set the modem to 2.4ghz only, and got my son (it's his dongle) to follow the instructions you provided. He reports that his system (WIndows 10 fully updated) said...

Hi there I have changed my ISP and I initially setup their wifi 6 router (Sky Wifi Router AR2140). Everything connected except one thing... My son's wifi dongle (TP-link-WN822N version 3) could not...