Openrc based /etc/fstab not works

[Mon-ius]

As suggested in https://github.com/rclone/rclone/wiki/rclone-mount-helper-script with systemd;

for the net mount in /etc/fstab;

sftp1:subdir /mnt/data rclone rw,noauto,nofail,_netdev,x-systemd.automount,args2env,vfs_cache_mode=writes,config=/etc/rclone.conf,cache_dir=/var/cache/rclone 0 0

I tried to migrate the similar setup with openrc by replace the option _netdev with netmount, and removed x-systemd.automount, but it not works as expected

I dont want to write a single openrc service file for mount it, would u give some tips for adapt the existed fstab service?