My iPhone 11 battery health went 99 after 3 months

I've had my iPhone 11 since October 2th. I haven’t done anything harmful except playing a car game for 2 weeks. I would charge this phone every 2 days in the first days since I wasn’t using that much and I wanted to keep the battery good. Then I started to charge every night.

I would get it down to less than 20 and charge it at night till 7 am till its 100 percent and use normal charging. It would stay on 100 percent for a bit but my friend said it wouldn’t harm since the iPhones now how to stay at 100 percent so I didn’t stop doing that.

My friend has an Xs Max and his battery health is 100 after more than 1 year. I was so shocked when I saw my battery health being 99 percent . Should I worry about this?

are there any tips to not let this happen?