I been using ZTE MC801A + u mobile postpaid plan of 98 (unlimited hotspot device + 1TB )previously as alternative due to the unifi port full in my area. Average download / upload around 250-300mbps / 75mpbs.

I would say it highly depends on the 5G signal. I managed to find a spot in my house, a particular wall that give me quite consistent experience. Plug that into the mesh and it works seamlessly.

In fact, I am selling off the ZTE MC801A as I have gotten the port, so let me know if any of you interested.