rax120v2 wifi slow and 5g can’t connect

I just bought a rax120v2 to replace my centurylink router. I’m running it straight off of the ONT and have been able to set up that connection just fine. I’m getting 940-950 up and down at the router via the nighthawk app speed test. However, no matter what settings I use I can not get any device to connect to the 5g network and devices on the 2.4g constantly drop out. The fastest test results I’ve been able to get on wifi is around 100-130 up and down.

I have updated to the newest firmware available and have done a factory reset after the firmware update. Nothing seems to change the 5g connection issue and the speed. I am using an iphone 13 pro max and a brand new msi gaming laptop to connect and test the wifi speed so the device wifi capabilities shouldn’t be an issue.

Any other things to try before I return this as possibly defective?