I had a similar problem with an NUC where the install would work but was unbootable after. In my case the USB showed up as both a BIOS and UEFI boot device and the mobo was picking the legacy mode. This made the install a legacy boot install which was not bootable.
To fix it I had to manually choose to boot the install USB’s UEFI mode.
What make and model, what problem is it giving you?
Maingear ML-17.
Uefi does not see any version of Linux as bootable after installation.
I can get it to see grub, but it fails to boot when selected.
I had a similar problem with an NUC where the install would work but was unbootable after. In my case the USB showed up as both a BIOS and UEFI boot device and the mobo was picking the legacy mode. This made the install a legacy boot install which was not bootable.
To fix it I had to manually choose to boot the install USB’s UEFI mode.