MarSOnEarth Linux 6.1 LTS branch is used on 6th, 7th, 8th and 9th generation Pixels as their bare metal kernel. 6th and 7th generation Pixels launched with the 5.10 LTS branch but moved to 6.1. 8th generation Pixels launched with the 5.15 LTS branch but moved to 6.1. 10th generation Pixels started on 6.6. 6.6 is also used for microdroid VMs on devices and the emulator. 6.12 will be used for microdroid VMs and the emulator soon, then it will be the next kernel on bare metal. We don't know when Pixels are going to move to the newer branches but they will move to avoid being on end-of-life kernels.