[dominis]

I'm not familiar with this project, just checked their GitHub Readme and if I understand correctly they block what you want them to block. Sinkzone does the opposite, it allows what you want to allow, and blocks everything else.

[q2dg]

Well, you can block everything using a wildcard blocking rule (for that, go to "Filters → DNS blocklists" and add this custom rule: ||*^ ) and then you can allow the domain (and subdomains, if needed, for instance "everything.ycombinator.com"; for that, go to "Filters → Allowlist" and add this: @@||ycombinator.com^ )

[ameshkov]

Alternatively, you can do something like this: *$denyallow=example.org|example.com

Blocks everything except example.org and example.com.

Works in AdGuard Home, AdGuard DNS or any other AG product with DNS filtering capabilities: https://adguard-dns.io/kb/general/dns-filtering-syntax/