iPhone 15 battery health drops

There is nothing wrong with your phone and NO, you cannot claim warranty. On average, an iPhone can lost about 1 - 2% in battery health per month of ownership. Battery health decline is not linear, meaning it can remain steady for a while, then drop a few points. But in your case, your battery health decline is well within the range of normal and not something you should be concerned with. One thing you can count on is that battery health only goes one direction and that is down. When the day comes your health dips to 80%, which is WILL do, it will then be time to pay Apple to replace the battery.

Until that day:

1. Don't let the battery fully deplete
2. Try to avoid letting the battery go below 20%
3. Charge your phone at night, EVERY night, ALL night, with Optimized Battery Charging turned on
4. Read this --> Batteries - Maximizing Performance - Apple
5. Stop worrying about something which is normal, inevitable and can't be stopped

My iPhone 15 battery health drops to 93% in 6 months is it good if not tell me i can claim my warranty

If the Battery Health drops below 80% in the first year, you get a new free battery.