You posted something very similar back in Feb '21. VM posted back on that topic but there was no conclusion to the last post. Did you establish the cause of the issue back then and what was the resolution? What issue is your son experiencing at the moment with the connection?
Gamers' complaints are often to do with latency on the connection and, on your previous topic, you set up a BQM graph to monitor the connection. That live monitoring graph is showing as empty at the moment. If your IP address has changed in the meantime, or you have deactivated the monitoring, that could be updated so you can start tracking the connection again to see if any high latency is present.
This 'Quick Start' forum might not get you the best help with this query. One of the forum VIPs or moderators might kindly move this topic over to either 'Networking and Wi-Fi' or 'Speed' where the resident tech experts should be able to give better advice than me. In the meantime, or until that happens, someone else may also chip in on here.