Ubiquiti UCI stuck at 40Mbps upload

I’ve got a 2 gig plan (my account says ~2300 down and ~300 up), but my brand new Ubiquiti Cable Modem is stuck at 1400 down and 40~43 up (the upload is what I’m concerned the most).

I tried help representative and they are 100% certain this specific modem is not capable of higher speeds - they double checked and cross checked. They eventually sent me to “tech department”, which was a bot that concluded it must be a problem with my Wi-Fi setup. I have screenshots if that helps.

 This modem is certainly certified for next gen speeds, but i can’t break that helpdesk wall.