Hi,
here is my experience with the new MacbookPro from 2021 and macOS Monterey 12.3.
The ping spikes are still an annoying problem especially if you are working remotely via SSH.
After endless debugging and tracing I solved the problem by deactivating the "Find My Mac" feature in the iCloud settings and restarting.
I don't get why Apple is not addressing this problem. In my case I had the ping spikes every 5 seconds causing SSH, RDP connections to lag big time. This needs to be fixed because the "Find My Mac" feature is a huge plus and I don't want to deactivate it every time I leave the house.
Greetings