Dear slim0287,
Take a look at the following guides: https://torguard.net/forums/index.php?/topic/1374-adding-dns-over-tls-support-to-openwrt-lede-with-unbound/
It is for DNS OVER TLS - This method combines Unbound (as a caching proxy) and Stubby (as fully featured TLS forwarder).
I run GETDNS and STUBBY with Unbound DNS and Dnsmasq for DHCP. You also can leave out GETDNS and STUBBY see here: https://blog.grobox.de/2018/what-is-dns-privacy-and-how-to-set-it-up-for-openwrt/
Just follow this : Proper Setup For New Native Unbound DNS-Over-TLS Feature Starting With UNBOUND 1.7.1
Peace and God Bless,
directnupe