Seconding @boyceke1 's comment here about possibly updating the developer documentation! I had been following the ‘DevCuts’ video on installing Fedora, but that is going to NVMe which I am already using for something else. The installer doesn’t see SDHC/MMC at all (as per my other question).
So I really would like to get Ubuntu 22 installed on eMMC. If the way to do this is through u-boot, then my problem is that I can’t figure out how to boot into the Ubuntu installer (which is EFI based). I’ve tried ‘bootefi’ one of the files from the installer image that I loaded into memory; but the installer doesn’t find the installer media after that.
There’s nothing else on the Ubuntu installer image; no Device Tree file, just three ‘.EFI’ applications.