You mean the Linux kernel that the GrapheneOS project has to request every update for and then has to wait up to weeks to get a Google Drive link?
The GPL is worth nothing if nobody is enforcing it aggressively.
The GPL is the only reason they even get that. More enforcement would certainly be good, but it's not like the GPL is worthless without a legal team backing you up.
Could you quote the part of the GPL that they're not adhering to (which you seem to be implying), in this situation?
Yes, as opposed to the Fuchsia kernel where they wouldn't even get that. We're lucky Google is institutionally incapable of creating things.