Works fine on Firefox from a custom Android ROM through a VPN here. Last time I checked a post where people complained about Cloudflare, even Ladybird for Android made it through. You need cookies and Javascript, but that's all you need to pass the technical checks it seems.
Cloudflare likes to block things like Tor and CGNAT because of the abuse and unidentifiability those networks provide, and maybe there's a filter on some enemy states set up by the British government, but they really don't seem to care all that much about what you're running on your phone. Blocks seem to be largely network-based in my experience.
This is absurdly dishonest. I don’t use Chrome. I use a VPN sometimes, when I’m travelling, in a DigitalOcean IP range (which has a dubious reputation). I don’t live in the US or Europe, which is often Californian for ‘a list of trusted countries’. I’ve never, once, ever, had an issue with CloudFlare.
The regular vocal super-minority of people that have this issue need only expose the fact that they’re running Lynx on their Gentoo-powered toaster, upside down, on the international space station.
If you hit a problem like this I'd like to hear about it. If you're willing I an take a HAR file and pass it on to the Turnstile team and they can see why.
Sorry, I missed your reply. Thanks for the offer. I'll try to figure out whether this phone browser (a rather old Firefox fork) can take HAR traces and send it to you by email if I succeed.
Edit: No VPN, no Tor, no add-blocking, Javascript & cookies enabled. The only suspect is old hardware and slowly maintained software (although updated only recently by the vendor)