This discussion turned into a complete disaster.
The insulting and political comments about people from certain countries or regions were unacceptable and not allowed in our community. I've removed posts that were along those lines. I've also removed any replies to removed posts so community members can read the thread without getting confused.
I'm not one who is involved in these kinds of decisions, but I do not think that this is something the developers would work on. GrapheneOS developers do fix serious upstream bugs that break UI/UX for our users, but this doesn't seem to be one of those cases. It seems more like something AOSP developers meant to do.
Adding AM/PM to the clock may be easy. Adding a toggle to make it optional may also be easy. GrapheneOS is an open source project, so someone can look into it and submit a PR or open an issue in the issue tracker and ask if a PR for a toggle would be accepted, assuming it meets the project's standards of course.
Keep in mind, though, that merging a PR doesn't mean the job is finished. If the PR is accepted, then the new feature has to be maintained into the future as well. And as de0u pointed out, the code may be updated often, which means additional work for the developers to maintain the change.
Reading through this discussion, it doesn't seem there's much interest in adding AM/PM to the clocks. Members of the development team have lots of work to do and it's not clear that the proposed change would benefit a lot of our users. It may be more work than people realize to add and maintain the change for little benefit.
Anyway, I'm going to restore this thread. Please leave politics out of it and be respectful of others.