After happy with Installing a NVMe SSD in the PineBook Pro for a while, the day finally came: the rolling update breaks
/boot partition to this look.
blkid, golden commands
ls came to rescue. They told me the partition is probably gone, but the root disk looked fine. So? I did these with few possible solutions here:
dd if=/dev/mmcblk2p1 of=boot_backup.img
dd if=boot_backup.img of=/dev/mmcblk1p1
mount /dev/mmcblk1p1 /mnt
# Write back NVMe PARTUUID shown by `blkid`
My SSD Pinebook Pro booted back! What a memorial day.