How to clear all service workers from Safari iOS

My "Screen Time" app keeps showing some websites which I haven't visited in weeks (eg. Darebee, BBC sports, Puma shoes).

Based in some responses here in Apple communities, I tried clearing "screen time" by disabling it and then reenabling it. It did clear the data. But as soon as I opened safari, all those websites showed up again. All with the exact same time of use.

So, as a last resort, I did the following:

• Closed all safari tabs
• Closed all apps
• Went to [Settings > Safari] and did both [Clear History and Website Data] and [Advanced > Website data > Remove all website data].
• Cleared screen time again.

Screen time didn't show the websites at first, but as soon as I opened Safari all of them immediately appeared again. Which leads me to think those are probably some service workers on the background, that simply never get cleared.