If you're unsure if the element is blocked by your extension or just missing from the site, open the page in Incognito/Private mode (where extensions are usually disabled by default). If the element appears there, it’s definitely your ad blocker.
Select the Area: Hover over the empty space where the missing element should be. If the element is hidden but its "container" is still there, you can see the code highlights. unblock element adblock
Sometimes the broken element is not an ad but a cryptocurrency miner or a modal popup script. If unblocking an element doesn't work, try: If you're unsure if the element is blocked