OpenTitan has open silicon (RISC-V) and is capable of open firmware (based on Rust TockOS) and is coming to 2025 Chromebooks, https://news.ycombinator.com/item?id=44416304. Hopefully a derivative of OpenTitan will ship in future Pixel devices.

Google Pixel hardware provides nested virtualization, enabling a Debian Arm "Linux Terminal" in pKVM/AVF VM, with use of Debian package repos.