New modem and new plan, yet still seemingly receiving old plan's speeds to gateway

We recently upgraded our modem to a CAX80 and activated it on our old blast plan to make sure we could continue to use it for wfh.  Once we activated it and verified we had a connection, we upgraded some time later to the gigabit+ 1200mbs tier.

We have waited more than the 24 hour period, hard power cycled the modem for a minute+ as recommended by Netgear, and have checked our modem's cable diagnostics page to make sure there wasn't an infrastructure->Cable modem issue (We have a low signal/noise and the power spec is in range enough to support higher bandwidth)

However, over multiple tests: First with an internet->gateway speed test, second via a device connected directly to the router through gigabit ethernet, and third via a 5ghz device that had a 800Mbps wireless link, we are unable to exceed our old tier's plans by much.

Is there a way to verify that the correct gigabit bootfile has been sent to our modem? Or that our old disconnected modem being on our account isn't somehow causing an issue?