Multiple DoTs - Is it possible?

[Tecsidia]

Hello OPNsense Community,

I have a custom Mini PC that I'm running only OPNsense as a Firewall for my home infrastructure. I have another OpenWrt in another hardware from FriendlyElec which is called Nano Pi R5S, this one is playing a role as Load Balancer for 2 of my Internet connections using mwan3 in Dual Stack with IPv4 and IPv6 (this setup will provide 4 Public IP addresses for each of my devices within the network). OpenWrt will combine the Internet connections and then connect with the OPNsense directly.

In the OPNsense, I've configured it to make use of Unbound DNS over TLS with 2 of Public DNS from Google and Cloudflare, below are the configurations of them:

1 - Google DoT (IPv4)
2 - Cloudflare DoT (IPv4)
3 - Google DoT (IPv6)
4 - Cloudflare DoT (IPv6)

In General settings of the Firewall, I cleared out the initial DNS that I had configured when I was setting them up which were 8.8.8.8 and 1.1.1.1 to make sure that the Firewall only use DoTs.

Everything is working fine but the loading of the websites is a bit slower than when I still had the "normal" DNS with 8.8.8.8 and 1.1.1.1 only.

My question is: Is my configuration of the DoTs correct? Or should I only need one DoT at a time instead of mixing up Google and Cloudflare? Please advise.

Thank you!