@tithugues That is a fancy method for normal users.
Before you could easily remove all cookies via the lock icon, with one click.
Have no idea why Opera removed this practical feature.
Now, Opera has made some stupid trash can list without listing actual cookies.
Even if you delete all the ones mentioned there, you will find a lot more at opera://settings/content/all
That change in version 100 is not an "improvement" dear fu@king Opera. 🐮