Optimized Battery Charging issue on my iPhone

According to Apple:

Optimize iPhone battery charging:

iPhone has a setting that helps slow the rate of your battery’s aging by reducing the time it spends fully charged.

This setting uses machine learning to understand your daily charging routine, then waits to finish charging past 80% until you need it.

1. Go to Settings ➢ Battery, then tap Battery Health.
2. Turn on Optimized Battery Charging.

Click ▶︎ iPhone User Guide.

From my personal experience, it does take time, because it tries to learn when you begin the charge and when you remove or unplug. 😉

Machine learning takes time to determine when to apply optimized charging.

How long have you been consistently charging your iPhone?