optimized battery charging on my watch ultra - watch is never ready on 100% when I need it.

I have a new job. more than 2 months already. My alarm goes on at 5:30. I spend some time in the bathroom so I take the watch of the charger around 5:50 for the last 80 days. The watch is always on 80% charge. On weekends, when I try to leave the watch on charger until its 100% charged, its usualy around noon. I can find online only info how to turn the optimized charging on and off.

How can I set the time, when it should be ready? Why its not taking the time of the alarm in the morning which I have set up for getting up.How can I reset the machine learning, which is super stupid, so it can start learning again without reseting the watch to factory settings?