Bootable x86 Ubuntu 20 images

Hi all, I’m new here. We use an x86 device that has a sata drive. I’ve been following the guides and googling around and managed to get everything to a point where my device was booting into grub with the mender img on the drive. I’m stuck there but not giving up yet. I was wondering however, if I get this working, can I get to a point where I just have the image deployable via unattended USB? We have a warehouse that orders the devices and I just want them to plug a usb in to load the OS.