pihole -a hostrecord used in the documentation.

[yubiuser]

Command still used in the documentation.

https://docs.pi-hole.net/guides/vpn/openvpn/dynDNS/

But removed by pi-hole/pi-hole#3296

Originally posted by @junpet in pi-hole/pi-hole#3296 (comment)

[yubiuser]

Alternative is to create a custom dns record.