Ventoy loads minimal grub shell on UEFI

[longpanda]

You can not install Ventoy manually bu just create a partition.
You must use the standard Ventoy install program to install Ventoy.
Ventoy can not installed to a partition of a Disk.
Ventoy need to occupy the whole disk, so when you install Ventoy to a disk, it will clean all the data in the disk,  recreate partitions and format them.