According to several reports, Samsung Galaxy A11 had already received its two major OS updates (Android 11 & 12). As a result, it is not eligible for Android 12 update.
It might receive security patches, but not get new Android operating system updates from its manufacturer.
As per your priorities, get rid of unwanted applications and also make sure that your internal storage is not fully filled. Restart your Galaxy device, once in a while. Install and use lite version apps. Most likely, if you follow the tips & tricks mentioned above, it will definitely resolve the lagging issue.
Be sure to click the 3 dots and " ✓ Accept as Solution" when you find an answer that works for you.
