The DNS plugin in Proxmox VE SDN is used to define a DNS API server for registration of your hostname and IP-address. A DNS configuration is associated with one or more zones, to provide DNS registration for all the sub-net IPs configured for a zone.
https://doc.powerdns.com/authoritative/http-api/index.html
You need to enable the webserver and the API in your PowerDNS config:
api=yes api-key=arandomgeneratedstring webserver=yes webserver-port=8081
Powerdns properties are: