iphone 14 pro max battery

i got my 14 pro max when it first released. it had amazing battery life for awhile up until 2 months ago.. i have every little trick people say to help the battery life but my phone dies SO quickly. i checked , my battery capacity is already at 94% , my boyfriend got the same one as me , at the same time and we both have our settings the same.. his capacity is still 100%. my phone is just about dead by 3pm with not much usage. when my phone charges to 100% i unplug it, i got back to sleep for a few hours, wake up with 2 notifications and my phones at 35%. i understand if it was draining even 20% but for it to drain 70% while not even being used is horrible. what do i do?