Same issue.I recently cleared significant locations on my 12 Pro Max in order to aid optimized charging and it has yet to log any places. Anyone have advice ? Yes all settings are on !
It took two weeks after I cleared it and I have optimized charging on two iPhone 12 Pro Max' now !!!!I believe they start to sync in every day when at 12:00AM.
15 days for my 12 Pro to start optimized charging.After struggling to get Optimized Charging working on my 11 Pro, I made certain when I got the 12 Pro to do all the things I knew needed to be done from day one. It took two weeks (exactly) before Optimized Charging started working on the 12 Pro.