Nah, I’m good, 0v0 did the work. this was fun!

Keep us posted :)

Check out the file update.zip > system.zip > zImage

It’s the image for the device probably, check this guide out

https://jamchamb.net/2022/01/02/modify-vmlinuz-arm.html

You can probably get some sort of boot script implanted in there, or even just load the image in a vm, modify it, and recreate it.

You might also need to modify the install script there since it seems to check if the update already exists and it might not run thinking you are up to date.