curl -L https://github.com/ventoy/Ventoy/releases/download/v1.0.96/ventoy-1.0.96-linux.tar.gz \
  | tar -xmpz

cd ventoy-1.0.96

./Ventoy2Disk.sh -i /dev/sdb

copy isos to /media/user/Ventoy (on /dev/sdb1)

test:

lsusb
Bus 002 Device 007: ID 1b1c:1a0a Corsair Survivor Stealth Flash Drive
[...]

$ sudo qemu-system-x86_64 -m 512 -enable-kvm -usb -device usb-host,hostbus=2,hostaddr=7