Battery Health Dropped to 99% in a Month After Normal Use of the iPhone 14 Pro Max Device

The battery health of my iPhone 14 Pro Max device, which I have used, has dropped to 99% after a month. When my battery charging usage drops to 20%, I plug it into the charger and when it reaches 100%, I take it off the charger. It is not normal for the battery health to drop after careful use in a month, and there are users who complain about the same problem on the apple forum pages, and we think that this is a software problem because battery health should not decrease in a month. I saw and saw that Apple call centers could not offer support on the issue. Attached is the link for users who have problems with the subject. The iOS version is 16.3.1. We request you to fix this problem by releasing a software update as soon as possible.