Cannot play games online with 5G Home Internet


I'm not able to play any video games online with my new 5G Home Router. Any help is appreciated. I called the 5G care line and they were unable to help.

When I try playing multiplayer games/trying to connect with other people, it would just kick me off the server/lobby. I'm getting a NAT Type 3 or Strict. And it's happening on both my XBOX and Playstation 5. Happens on the wifi and wired directly in.

Tried port forwarding and it was letting me connect but I was experiencing major lag. DMZ also didn't work. I switched from Spectrum a couple weeks ago. No problems with Spectrum at all.

Any help is greatly appreciated. Thank you.