Yes, the Avast Mobile Security on my Home screen (as I don't have any of the other products installed (so no Avast Group).
This only means that there is one notification displayed, it does not imply that Web Shield is not working.
Please visit this website (in Google Chrome) to test Web Shield: https://web-shield-test.avast.com/
The problem being on opening the App (for the Samsung A12 mobile phone) there are NO notifications and no matter what I do, nothing resolves that. Interestingly after testing the webshield-test link (and no alert) there is no figure 1 over the avast icon
The web Shield certainly doesn't work as the My Statistics shows 0 websites scanned, despite browsing several different sites. A check on the link you gave opens the page blank.avast.com on my Samsung A12 & A51 Android 11
I have literally spent days on this, I did lots of tests on my Samsung Galaxy Tab S4 (Android 10, which was working) to try replicate the settings and or change some settings to see if I could find one that broke it. Reset it and try to find a way to apply this in the A12 and A51, I still couldn't get the either to work and worse still I screwed the Tab S4, so much so that I ended up doing a system reinstall.
The upshot of this is Avast users who are in the unfortunate position of using a Samsung phone (pretty damn popular) and Android 11, they are screwed (sorry about the use of technical terms).
Unfortunately the Avast Website has zero information/help for Samsung mobiles on Android 11.
The Samsung Deep Sleep (Avast locked in this area, Allow Background Activity) is a killer and despite the extensive searches I have made (many, many, many hours) I am no closer to a solution. Possibly worse I have made so many changes and reversions, I haven't a clue where I am.