RE the install ISO manjaro-gnome-20.0.3-200606-linux56
It just flat out doesn't see anything that isn't a SATA or PCIe drive.
I tried booting with and without UEFI, and everything I could find in searches (sorry, no links, had to boot out of the live instance to write this).
I have not had the time (or flash drives enough) to try other editions.
I need to be able to install to a USB drive because the eMMC drive on my laptop has issues.
Architect has never worked for me, though I did give that a try and it would not allow me to select any of the USB or uSD drives. It could see them, but would not let me select them.
I should note just in case someone asks, they are USB3.0 64 GB Sandisk drives, which I have used for this plenty of times in the past, just usually not the Gnome edition, so I don't know if this is an ongoing issue or a new one.