Currently, there are no other packages providing dns performance testing tools.
Just for the record, the pdns-tools package provides a few.
Co-maintainers are welcome, but not needed. I would need a sponsor.
You may want to get in touch with the DNS Team (https://salsa.debian.org/dns-team, team+...@tracker.debian.org).
Kind regards, -- Peter van Dijk PowerDNS.COM BV - https://www.powerdns.com/