It works, but it needs a bit of work. In particular, you need a router capable of redirecting all DNS call to the DNS you specify (Asus routers can do that, for instance). Moreover, one should also use a blocklist to forbid the connection to most common DoT/DoH public servers, such as

https://raw.githubusercontent.com/hagezi/dns-blocklists/main/adblock/doh-vpn-proxy-bypass.txt