Apple has already taken the US government to court and forced them to back down after the FBI demanded that they insert a backdoor into iOS.
> In 2015 and 2016, Apple Inc. received and objected to or challenged at least 11 orders issued by United States district courts under the All Writs Act of 1789.
https://en.wikipedia.org/wiki/Apple%E2%80%93FBI_encryption_d...
This year, Apple took the UK to court and announced that they would strip encryption features from UK users before they would give in to UK demands for an encryption back door before the UK backed down.
If Graphene has the money to do so, they should fight it out in the courts.
There's a reason why they haven't had issues since then, not even with Trump.
And it's not because they're hiding your data. See their disclosure report for data requests.