My iPhone XR is lagging/throttling

[Matrem]

Hi, I bought my iPhone XR 2 years ago and now I experience some lags, especially while scrolling apps like reddit or turning on camera app. I have 88% of battery capacity, iOS 15.4.1 and mores less 20 gigabytes of free storage. I have done factory reset a couple of days ago but it didn’t improve the performance. What can I do? The only thing that comes to my mind is the replacement of battery since maybe it is not capable of handling more exhausting tasks.

 

[now i see it]

It seems that any time the OS gets updated, the iPhone has to do a bunch of stuff in the background that can take days to settle down.
Maybe try waiting it out and leave the phone plugged into the charger overnight so it can do whatever it needs to do.

That’s the optimistic suggestion.
The cynical suggestion is that maybe the last update you did to iOS sucked and maybe the next update will fix what it broke.