Wow you’re right. Find My has used 10% of my battery in the past day even though my iPad stays permanently at home. What’s worse is that my battery life has dropped from 100% health to 96% after a year even though I enabled the 80% charge limit. I wonder if Find My has added excessive wear on the battery.
A lot of the wear comes in when the charge falls below ~10%. Although 100% > 96% sounds pretty normal unless the device is brand new.
A lot of lithium batteries will have a hit of initial wear compared to brand new, level off the wear for a long while, then start declining again. It going from 100% health to 96% health in say the first year probably isn't too concerning, assuming it levels off around there soon.