Installing onto ssd makes it disappear!

I've been trying to install Ubuntu 20.04.1 LTS onto my SSD: AS 2280P4 M.2 PCIe 512GB and
Motherboard: Gigabyte Ultra Durable B550 D53H

I tried Gparted w/o success so tried this:

 $ sudo mkfs.ext4 -L MySSD /dev/nvme0n1
mke2fs 1.45.6 (20-Mar-2020)
Found a gpt partition table in /dev/nvme0n1
Proceed anyway? (y,N) y
Discarding device blocks: done
Creating filesystem with 125026902 4k blocks and 31260672 inodes
Filesystem UUID: 70e1d380-0699-4e59-b98f-b15a182985a9
Superblock backups stored on blocks:
 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
 102400000

Allocating group tables: done
Writing inode tables: done
Creating journal (262144 blocks): mkfs.ext4: Invalid argument while trying to create journal

After that my SSD vanishes:

$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 55,3M 1 loop /snap/core18/1885
loop1 7:1 0 62,1M 1 loop /snap/gtk-common-themes/1506
loop2 7:2 0 217,9M 1 loop /snap/gnome-3-34-1804/60
loop3 7:3 0 64,8M 1 loop /snap/gtk-common-themes/1514
loop4 7:4 0 50,7M 1 loop /snap/snap-store/481
loop5 7:5 0 55,4M 1 loop /snap/core18/1944
loop7 7:7 0 51M 1 loop /snap/snap-store/518
loop8 7:8 0 31,1M 1 loop /snap/snapd/10492
loop9 7:9 0 31,1M 1 loop /snap/snapd/10707
sda 8:0 0 3,6T 0 disk
├─sda1 8:1 0 33M 0 part
├─sda2 8:2 0 1,8T 0 part
├─sda3 8:3 0 479M 0 part
├─sda4 8:4 0 1M 0 part
├─sda5 8:5 0 513M 0 part /boot/efi
└─sda6 8:6 0 1,8T 0 part /

Any help would be greatly appreciated