iPhone 11 pro 256gb battery health

I have been using a brand new iPhone 11 pro 256gb and the battery health decreased down to 98% within one month of usage. i am not so heavy user but tends to have such a good service from such a reputed company. i can't seem to enjoy using my iPhone anymore. please update a possible solution or a replacement. I am eagerly waiting for a feedback. Please do update. i have invested my hard earned money on this phone.