I'm in UK and access twitter through a range of anonymisation tools. Haven't seen this screen yet. No way on earth I'm doing ID verification.
Discussion
Have you ever used Xitter on your phone? If you have, you are fully identified.
How?
2nd hand phone bought anonymously and running GrapheneOS
No SIM in the phone, only use WiFi/hotspot
Camera, microphone and location permissions disabled
Always on Proton VPN
Single use email address for account creation
