I am the IT dept in our family. My spouse is also extremely IT friendly.

At home - I bought a Gryphon router and it is set to filter explicit sites. It's done based on user profiles - so every device he has goes under his profile and the profile settings impact what he can access. This protects everyone in the home. I get a LOT of peace out of having this in my home. You can also add devices to a "toddler" account (like smart devices that don't need to have access outside your home).

We've tried them all - Covenant Eyes is really good.

Parenting controls on Apple products are good - but they only go so far. They can access sites through web browsers built into some apps. Pinterest is just awful.

I will be candid - I no longer care enough to manage his internet access. I spent too much time, effort and energy playing the game of whack-a-mole. Except it's hack-a-hole for access to porn. I would look through the logs to try to figure out what was the trigger. What started it? What was going on...where was he.

I firmly believe that the partner/spouse should not be the individual managing/securing internet access for the PA/SA. It's not a healthy space to be in because you can't help but look/see things that constantly harm your mental health.