Why is it ironic? Sounds like an honest question from someone who doesn’t know.
Don't worry, I'm not coming down hard on said person. The thread is about a GrapheneOS bulletin, whose members are well-documented contributers to AOSP.
Can you link to patches or commits they upstteamed? I'm not aware Google ever accepted any.
Nothing in last 5 years; and if we ignore the last one, Nothing in almost 9-10 years. I am not sure how much weight it holds. Now if that's on Google on not accepting stuff that's different matter
Most of it is one liner config changes too, not much of actual code.
What about issue tracker discussions, mailing list discussions, security vulnerability reports etc.?