Can you also answer these questions?
- How long have you been using your phone
- How many times did you charge your phone in that duration and from what percentage to what percentage.
- How long have you been on social media, you can send your digital wellbeing cycle which can be found in settings>>digital wellibeing (which can be found on settings home screen) for a better data result(I just know these, I am not a bot) but if you don’t want to, just list your screen hours, if needed, you can privately message me.
Based on these, we can use deductive reasoning on what is the issue or if you have an issue at all.
P.s. battery life shortage isn’t usually affected by updates.