This is after exactly 1 month of heavy usage on my XR.
Not happy but I guess it was to be expected.
On Mondays and Thursdays it spends a lot of time on the charger to be used as a satnav for work. I regularly drain it to sub 20% as well before a full charge with an iPad charger at night.
I’ve also just done a full DFU firmware reflash and setup as new on Monday, so this might have triggered the software to report the lower battery health now.
Coincidentally the battery doesn’t seem be be lasting quite as long as before when I was on the 12.2 beta (now on 12.1.4) so not sure if something has gone wrong in the restore or if I’m just imagining something is wrong.