Degraded iPhone Battery

My iphone 11 is just 10 months old and its battery health has degraded drastically to 86%

I have another iphone (xs max) and after 3 years of usage its battery health now shows 82%

86% after just 10 months is something not normal.

Unless it drops below 80% it is not eligible for a battery service/replacement

Warranty is close to getting expired, that means, most probably it would be below 80% just after the warranty expires

Support or Service does not help and as per them it is still in good health since its > 80%

What do I do ?

Is this another case of degraded quality from Apple ?

I feel like a user of an ordinary android phone now :(