As several others have already said here, GrapheneOS is not necessarily rooted. So that's a lie.
Also, I've seen such audits internally, and they don't care about security at all. They care about the theatrics of security waaaaay more.
For example, I was at Santander in 2024, during its huge data breach. Here is the list of actions which are supposed to prevent the same kind of attacks again in the future:
-
Yeah, it's an empty list.
But of course, they made our life more difficult. In the end, I literally had more permission than before, because they were even sloppier than before. But of course, I had to change my password more frequently, and I had to type it about 5x more.
Audits are primarily about liability and safe harbors in lawsuits. Companies get audits on record so that if something happens they have someone to throw under the bus and pass damages off onto.