I have a domain where Cloudflare does not affect it at all

I have a domain where Cloudflare does not affect it at all ! Any changes you make in the Cloudflare control panel to improve performance, set rules, etc. have NO RESULTS

I wanted to use the APP to modify the HTML of the site but it didn’t work either.

I own the domain, but I don’t manage the website (the site was generated by a CRM service that also offers a very low quality website). I don’t have access to the code. So I want to make small aesthetic modifications, but it doesn’t work.

I also can’t compress the HTML or apply other improvements from Cloudflare

I manage more than 20 domains on Cloudflare and it has never happened to me
When I inspect the source code of the site, I notice that there are elements of Cloudflare itself, but I think that they can be applied by the creator of the web, and that Cloudflare does not listen to my requests even though it owns the domain.

What could be happening?

Thank you!