Sure, but we were talking about using Unbound, or some other recursive resolver, locally. Unbound doesn’t use DoH or DoT for its queries, and most/all authoritative servers don’t offer DoT/DoH.

You would have to use some local stub resolver, route its traffic over a VPN, and then use public resolver(s) that provide DoH/DoT (and those still use plaintext DNS to do their resolution, the benefit you get there is the shared cache and semi-anonymization due to aggregation). Whether that is good enough is up to you.