how to enable 802.11n protocol on Ubuntu 20.10 (HP elitebook 8460p)

I just switched to a new router (Netgear C7000v2)) and now I can only run wifi on b/g protocols and my speed is suffering bigtime. I used 802.11n on my old router with the same laptop and my speeds were much better, so I know my laptop (HP elitebook 8460p) is capable of b/g/n speeds.

I've tried going to Advanced Network Connection and where it says to choose a band, only b/g are available under the 2.4 Gz band. why isn't b/g/n available?

How do I enable or activate 802.11n protocol?