Battery degradation

My iPhone 11 is only 1 month and 10 days old.

i play only games in it and everything I use is on other device.so I don’t give to pressure in it.but my battery health is now 97% I don’t understand, when it was 1 month from purchase date the battery health showed me it was 98 and within 10 days it fell down to 97.

now I’m really disappointed. Besides it’s battery consumption is really bad.

please help me with that