Intermittent WiFi router connection issues on Xbox One X

Check this link for a possible solution:
https://support.xbox.com/en-US/xbox-one/networking/cant-see-wireless-network-solution

Ports and your ISP usually don't have anything to do with a wireless connection failing, as the WiFi connection is only between your console and the router.

Is your console by chance enrolled in the Insider Preview Program?

While my Xbox One X works without issues via WiFi, the patch notes on some Insider Previews state that they are investigating cases with WiFi connectivity issues, and that people should report via the Feedback tool if their console loses WiFi connectivity.

It would help if you also said which WiFi router you are using, maybe there is an incompatibility between the Xbox One X and certain router models.

So you have a wifi connection from your xbox to your router?

When searching for wifi connection on your xbox, how many networks to you see? This could be the problem. Too many will cause interference and you will have a poor and intermittent connection.

I had this problem and I solved it by getting a wife adapter for my xbox and switching from a 2.4Ghz connection to 5Ghz connection. Had no issues since.

My xbox one x is hardwired and is already connected... its older xbox one that is wireless and cant connect... I would hardwire it but it's set up on other side of my place... other systems and devices connect to new wifi router no problem... its just
my old xbox cant connect to new wifi router

I’m having the same issue. I got a series X about 2 weeks ago and it won’t stay connected to WiFi. It usually will only hold connection for a few minutes, anywhere from 2-20 maybe? A couple times it has maintained connection for multiple hours though that is very rare. It sits next to my Xbox One X and a few feet from my PS5, all of which connect to the same WiFi network without issue. Due to location of the router, a hardwire connection isn’t possible.