Yeah, but they don't yet do DNS-over-TLS which is what Android 9+ considers "Private DNS" and allows you to define DNS servers without needing a VPN app.
DNS-over-HTTPS takes care of "how will I get my home Pi-Hole replicating my internet Pi-Hole without UDP port 53", and DNS-over-TLS takes care of "how will I get my internet devices securely getting DNS from my internet Pi-Hole".
So what I'm seeking to achieve is that the internet one is my primary Pi-Hole, and my home one is a secondary (reading from the primary but also cloning config should the primary be down).
Yeah, but they don't yet do DNS-over-TLS which is what Android 9+ considers "Private DNS" and allows you to define DNS servers without needing a VPN app.
DNS-over-HTTPS takes care of "how will I get my home Pi-Hole replicating my internet Pi-Hole without UDP port 53", and DNS-over-TLS takes care of "how will I get my internet devices securely getting DNS from my internet Pi-Hole".
So what I'm seeking to achieve is that the internet one is my primary Pi-Hole, and my home one is a secondary (reading from the primary but also cloning config should the primary be down).