In case you didn’t yet notice where it went wrong:
Your nvme’s switched “position” between the 2 lsblk’s:
1st lsblk:
nvme0n1 259:0 0 1.8T 0 disk
...
nvme1n1 259:2 0 953.9G 0 disk
2nd lsblk:
nvme1n1 259:0 0 1.8T 0 disk
...
nvme0n1 259:2 0 953.9G 0 disk
Always triple-check the drive name/number.
Aside from backup before formatting, I usually also disconnect the drives that should’t be changed and triple-check it’s the correct drive still connected.