just had my update couple of hours ago, so far i haven't notice a rapid battery draining. It depends on the network usage and f u are using data for ur net its one of the cause, also u can chek the device care on the right side on top click the 3 dot toggles and chek out if u have some app issues thats crashes regularly resulting rapid battery draining, and that's frequent causes.
i've experienced the same before, what i did is i turned off the background running app, and put all apps into deep sleep. since then my battery last longer than i expected. did you check if its heating? i suggest you should visit a samsung service center near you to rectify such issues.
i agree have it check on serv center. anyways. me too. i dont notice any issue. heating may cause the due to un used app playing on background and too many installed apps, games and notifications drain battery faster. regardless manage your apps well. specially the important ones. let the less used app put to deep sleep. so you can save more battery🥰