Они временно отключили ECH глобально, а не только для России:
https://community.cloudflare.com/t/early-hints-and-encrypted...

> Dear community,
>
> This note is to inform you of the status of Early Hints and Encrypted Client Hello.
>
> We have sadly had to disable both of these features globally whilst we address a number of issues with them. These issues are unrelated. We are in the process of adding a label to each of the toggles in dashboard to alert that they are disabled.
>
> We expect to re-enable Early Hints in the coming weeks, with ECH re-enablement for Free coming later in the year with roll-out to those in the beta in early 2024.
>
> We apologise for the inconvenience caused here and are doing our best to get these features back online ASAP.

Исправят всё и включат обратно