Comment by Andromxda

Not a dev, but legacy extended support means that there are no more feature updates, i.e., no new Android versions or QPRs, only AOSP security backports. Obviously there aren't any firmware patches either, as these devices are unsupported by the manufacturer, who is responsible for delivering any changes to the firmware.

https://grapheneos.org/faq#device-support:~:text=The%20follo....