Download Migiri, pay for it, have an accountability partner control it, block the URLs of popular sites that have pornogrpahic material (Reddit, twitter, etc) and enable the deletion prevention. Bonus points if you allow them to set your screen time code too.

You need to get an accountability partner irl to help you set up screen time and other accountability on your phone. It won’t fix your cravings but it can give you peace of mind for the first few weeks.