Volen Looking at the ticket in question: https://issuetracker.google.com/issues/227166806#comment8 Google assigned P4 priority to this issue and P4 is basically the lowest priority they have, described as "An issue that should be addressed eventually. Such an issue is not relevant to core organizational functions or the work of other teams, or else it relates only to the attractiveness or pleasantness of the system".
Thanks for looking this up and sharing it.
I would go further than this: enabling full functionality of Google's Pixel hardware and related software so it can fully work in an OS that is used by people who do NOT want to interact with Google is NOT in their business interests. A P4 response should be entirely expected, not only on this issue but others.
There can be and likely will be more impediments like this in the future. It is simply not in Google's business interest for GrapheneOS and the alternate, google-free ROMs which allow people to not be tracked by Google to grow.
I contend that future progress in degoogling depends not only in the software area but equally in the legal area (e.g. privacy and anti-competition).