Micay, of GrapheneOS and original creator of CopperheadOS, is not some random.
They have pushed AOSP security ahead and have made many upstream contributions over the years.
I remember when Micay first released CopperheadOS.
I spent most of early 2015 learning enough about kernels to eventually successfully port it to the OnePlus One in November of 2015 with near full PaX support.
https://github.com/Divested-Mobile/DivestOS-Build/blob/c0083...
Micay originated the Android Hardening Project, I believe it was called, and is the brains behind what was CopperheadOS, and now the superior GrapheneOS.
Micay, of GrapheneOS and original creator of CopperheadOS, is not some random. They have pushed AOSP security ahead and have made many upstream contributions over the years.