I see boatloads of ads in Safari on iOS. To the point that web browsing on my phone is intolerable, so I don't do it.
Which adblocker are you using? I have adguard and dont get ads on most safari sites but its just static DNS blocking so first party ad servers like youtube dont get blocked.
This is such a data-free anecdote. Which websites are showing ads? Which ad blocker did you install on iOS?