Well there is a bootloader - on Qualcomm its even UEFI, but you don't have access to it.
https://worthdoingbadly.com/qcomxbl/
That's somehow worse. Good for them that they made it convenient to launch their software on the device I paid for.
alt Hacker News
That's somehow worse. Good for them that they made it convenient to launch their software on the device I paid for.