Yes, you can.
In the LiveUSB Try Zorin trial, launch terminal and check your devices:
lsblk
You can unmount with the umount command, for example
sudo umount /dev/nvme0n1p* /dev/nvme1n1p* 2>/dev/null
You need to specify the actual drive partitions above with what you determined using lsblk
You can also unbind the drives from the kernel (Only for this LiveUSB Session) using:
echo 1 | sudo tee /sys/block/nvme0n1/device/delete
echo 1 | sudo tee /sys/block/nvme1n1/device/delete
When you run lsblk, now, you should see only the drive you want to install to.