When/how do I get the new upload speeds?

Hi, I hope you can help. My account now says my upload speed is 200 Mbps (for about a month or more), but I only get the historical 40 Mbps. Our neighborhood was upgraded (per an email I got from Comcast) several months ago. I have a Netgear CM2050V modem, which is on the Comcast list of "Next Gen Speed Tier" modems and my understanding is customer owned modems on this list will get the new upload speeds:

https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2023.09.11%20Full%20List%20of%20Compatible%20Devices.docx%20-%20vF.pdf

I noticed this week in the modem log my config file went to

d11_v_cm2050vims_gigabit_c02.cm, having formerly been  d11_v_cm2050vims_walledgarden.cm.

Yet I still don't get the improved speeds.

Is there any help here for how to get the improved speed, or is there a Comcast person here that can help? Thanks!