It does have a permanent mount point, this is the line in /etc/fstab:
UUID=00d6c142-ca89-4f65-93d0-dd74f14236f8 /mounts/00d6c142-ca89-4f65-93d0-dd74f14236f8 ext4 defaults,noatime 0 1
It does have a permanent mount point, this is the line in /etc/fstab:
UUID=00d6c142-ca89-4f65-93d0-dd74f14236f8 /mounts/00d6c142-ca89-4f65-93d0-dd74f14236f8 ext4 defaults,noatime 0 1
This is an NVMe SSD, AHCI is only for SATA.
I looked and couldn't find any settings for disks being hotswappable, and it hasn't happened on any other distros i've tried on this system, so I don't think this is it.
Steve Ballmer hasn't been the CEO of Microsoft since 2014.
Here's a higher quality version

is this loss?
pacman -Rns $(pacman -Qq)
It is. The disk is mounted at /mounts/00d6c142-ca89-4f65-93d0-dd74f14236f8