Since extensions aren't an option, you can download a standalone app from the Apple App Store that blocks ads at the network level.
In the same Content Settings menu, look for Intrusive Ads and ensure it is toggled off (which means it is actively blocking ads). 2. Download a System-Wide AdBlock App download adblock for chrome iphone
A "DNS-level" ad blocker filters out ad-serving domains before they even reach your phone. This works seamlessly for Chrome on iPhone. Block or allow pop-ups in Chrome - iPhone & iPad Since extensions aren't an option, you can download