I've seen other phones with GrapheneOS preinstalled. At least one seemed marketed toward shady customers. Does anyone know this vendor, NitroKey? They claim:

Nitrokey is the world-leading company in open source security hardware. Nitrokey develops IT security hardware for data encryption, key management and user authentication. The company has been founded in Berlin, Germany in 2015 and can already count ten thousands of users including numerous well-known international enterprises from various industries.

https://www.nitrokey.com/about