Why use fstab when there's systemd?
# /etc/systemd/system/media-server1.mount
[Unit]
Description=Mount unit for Server1
[Mount]
What[email protected]:/
# Where= must be the same as the file name! / is replaced by - in the file name.
Where=/media/server1
# You might have to install fuse first.
Type=fuse.sshfs
# Seems these are just fstab options.
Options=IdentityFile=/home/USERNAME/.ssh/id_ed25519,noauto,x-systemd.automount,_netdev,allow_other
[Install]
WantedBy=multi-user.target