It really looks this question - Developed an addiction. How can I block websites? - is a clever marketing spam post to promote Freedom.to ... it's written in a manner to reject all other reasonable solution already available in macOS / iOS (like screen time) thus inviting "other solutions" where Freedom.to can be promoted. And now SE itself is promoting the question further as a HNQ because of its dramatic copy.
Another similar question is How can I block the Twitter website on iPhone? which also specifically says it doesn't want to use screen time, thus inviting "other solutions".
(Yes, I know it is hard to judge whether these are indeed spam, as they don't promote the product directly but invite us to innocently suggest it as an answer. I just thought I'd make a note of it here so that we can be aware of the pattern, and keep an eye for it).