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6 days agoNo idea about most of your question, but I think you entered the wrong UUID. nvme0p1 is the name of the partition.
Use blkid in the Terminal, the output will be something like:
/dev/sda3: UUID="a7d71686-0a65-4402-b6e6-b58430ef8351" BLOCK_SIZE="4096" TYPE="ext4" PARTUUID="0ea90c96-1b56-4c51-b07a-02e09285f291"
/dev/sr0: BLOCK_SIZE="2048" UUID="2020-10-22-14-30-30-00" LABEL="Ubuntu 20.10 amd64" TYPE="iso9660" PTTYPE="PMBR"
This is how a valid UUID looks like: a7d71686-0a65-4402-b6e6-b58430ef8351

Not yet, but it is in real danger.