Feature Request: Min TTL Bypass Override

According to this documentation (https://docs.controld.com/docs/ttl-overrides), it seems like it's an override for ALL bypass DNS records, so any higher set TTL would be set to the lower TTL. Could you provide a Min override in addition? For example, if the bypass record TTL is lower than 300 seconds, then set it to 300 seconds TTL, otherwise the original TTL is respected. I believe this is what the cache boost at NextDNS does. Thanks!