The GrapheneOS Mastodon post says,

"GrapheneOS will remain usable by anyone around the world without requiring personal information, identification or an account."

https://grapheneos.social/@GrapheneOS/116261301913660830

That raises the issues that GrapheneOS needs to solve, which may require more creativity than bold, somtimes combative statements.

If GrapheneOS doesn't comply with laws and regulations then they will sometimes be banned or restricted. If that happens, they may not be "usable by anyone around the world" for long.

That doesn't mean they have to capitulate or sacrifice security. They can find creative solutions, some of which are suggested here. The first step is to carefully read the spec to determine what is necessary, then talk to someone like the EFF, and find a way forward.