Yes, as DoH is locked off on Tor Browser and hidden (something I don't necessarily agree with, as I believe we don't cover in our threat/design model, maybe we should start adding issue with everything that is currently lacking).
As far as I understand this bug is about letting ECH work even with DoH disabled, by using the system's own DNS resolver where possible (i.e. Linux, Windows 11 and Android >= 10 - no dice for MacOS X).
Anyway the preference is checked within the normal DNS resolution flow (therefore there shouldn't be DNS leakage suprises), and it's not even enabled on stable releases yet, so nothing to do for now.