No, Cloudflare is not acting inappropriately at all.

This is standard industry practice, not just in the U.S., but also in Europe and the UK.

Hosting providers, telcos, social media platforms, and other similar entities generally comply with court orders or subpoenas directed at their customers.

It’s uncommon for these companies to challenge such orders unless there’s a very compelling legal reason to do so - i.e. some crazy demand.