Iphone 11 Pro Max Battery Life decreasing!

Is this normal?! I’m so worried because in just 2 months my battery life was already down to 98%. I took a record just one week after and it is already 97%. Can Apple do something about this? This phone is very expensive so the battery should be more durable than the previous older iphone models but its not. My friend has an iphone xr and her phone is 6 months old and it is 97%. My phone which is going 3 months of use and I charge it once a day, I don’t drain it below 25% and not over charge it too, but why is it decreasing so fast? Will apple replaced this? I hope that Apple will listen and help regarding this problem. It’s not easy to earn money and spend it to a very expensive item and just go to waste. I took really good care of my iphone and this is just disappointing and discouraging. Please, Apple.🙏🏼