Looking to try installing a GSI to a device without any third-party ROMs ported to it yet. Want to back up the stock ROM in case something goes wrong. Manufacturer doesn’t offer the stock ROM for download and the only copy online is from a website that looks pretty shady. Can unlock the bootloader, but no reports of anyone rooting or installing a custom recovery environment for it. Every tutorial says to just look for a ROM on the internet, but how do people extract them in the first place?
Edit: turns out this could be a weeks-long adventure. I spoke too soon and it turns out the OEM unlocking in developer options on Honor phones doesn’t get you very far. Following links may be useful in the meantime:
https://github.com/vcka/huawei-honor-unlock-bootloader
https://github.com/Martazza/Huawei-Bootloader-Unlocker
https://github.com/rabits/honor-tools
Will update if I succeed. Moral of the story: Don’t buy Honor phones if you intend on degoogling.