In my case, I've discovered that Devonthink (document/notes management app) is responsible. I've been meaning to file a bug report about it.
I'm surprised that Apple's power management doesn't have an alert for this. Surely an app that causes my Mac to become glowing hot while sitting in my backpack, not to mention slowly running out of battery, is a pretty important thing to intercept. Meanwhile, I keep being asked if Chrome should be allowed to find devices on my network, which doesn't seem nearly as important.
So many apps have telemetry and data collection and notifications that eat up your battery and bandwidth for business (no good) reasons.
I ran this app call Adblock which creates an on-device VPN (checks dns request)
Found for example the kindle (or audible?) app still does telemetry even if cellular data is turned off (to a2z.com)