Domains and IPv6 AAAA record whitelisting

Hello there,

Recently I have been playing with IPv6 internet. To my surprise my ipv6 setup works perfectly, however there is a problem. Not all routes to specific websites using ipv6 is great, and I am using nextdns as my dns provider. I was thinking that if nextdns could add in a feature where we could whitelist some websites to be able to use AAAA record and some website not to use AAAA record by default.

Either we could add a setting to default all websites to return A records, and some whitelisted specific websites to be able to return AAAA record to clients to browse, or the otherway around.
That would be great in controlling which websites could use AAAA record or default ipv4, cause right now I get all ipv6 available website to go through my HE tunnelbroker, which some of the webserver routes is not great compare to ipv4. That would be my suggestion to nextdns feature

Thank you