Here’s an example of the radio firmware and vendor blobs required for a pixel 9 pro XL build: https://github.com/TheMuppets/proprietary_vendor_google_komo...

Nobody, including Graphene, is getting away with building their own modem firmware. The reduced blobs are on userspace and some HAL components.

Yes, even Apple with its practically infinite resources took 14 years from when it acquired Infineon's mobile chipset unit to launching its C1 modem. So much of the telcos' allegedly open protocols are actually implementation-dependent that it takes a lot of testing on actual mobile networks to validate interop.

> took 14 years

It was at most 4 years. Intel was the one that bought them 14 years ago and divested most of the IP off to Apple 6 years ago: https://www.apple.com/newsroom/2019/07/apple-to-acquire-the-...

Do you claim that there's a place where I can find datasheets for peripheral devices for Google Pixel? Like GPU, etc.

No, but they used to publish the source code for the drivers as part of AOSP. Now they no longer publish the device trees. Check out GrapheneOS' other Mastodon posts for the gory details.