That’s true but there are a bunch of CDNs you can choose from and you can switch from one to another fairly easily. Cloudflare just happens to be the most popular at the moment but they’re not the only big player, not to mention smaller players.
FWIW I totally agree with the sentiment that Cloudflare (and AWS for that matter) is creating a too-centralized web. I just don’t see an issue with using CDNs for fediverse servers in general.
It looks like you have iOS Safari debugging turned on. Here’s the instructions I found from Apple to toggle it:
I found this info on this Apple developer documentation page: https://developer.apple.com/documentation/safari-developer-tools/inspecting-ios