New recommended modem not achieving upload speed

In response to emails from xfinity, I upgraded my cable modem to the recommended Hitron CODA56. According to xfinity, I should be getting up to 200 Mbps upload speeds per my current Internet plan. But I am still seeing the same old 40 Mbps upload speed when I run a speed test.

Both upstream and downstream LEDs are blue, indicating successful channel bonding.

Is there something I need to do at my end or xfinity needs to do at their end to enable the faster upload speed?