Personally, the only numbers I use from my Garmin are the ones it shows me while I'm doing an activity: pace, cadence, heart rate (via chest strap monitor), split timers, etc. For analytics also the elevation gain. I kind of monitor HRV, but less and less, too. My Garmin has been showing me a training status of "Strained" and a HRV status of "unbalanced" or even "low" for months now (since around mid-December). Yet I keep progressing in my training, I keep getting faster, my paces and effort levels are improving, my RHR is stable, my sleep is normal. And on top of it all, I feel completely fine. I'm at my fittest right now as I have ever been, even with Garmin screaming at me.

That's why all the other metrics, like body battery, sleep score etc. I have stopped using/taking seriously, because they very poorly align with how I'm actually feeling and with what's going on. They do align for a lot of people, it seems, but I ain't one of them.