I’ve always been in two minds about enabling it but, since you pointed it out I’ve enamelled it, I did check DNS leaks and it don’t seem to of made much difference.
SurfShark openVPN works the best with no leaks but has always been quite a struggle to connect a tunnel once connect though is good, WireGuard is best of all but streaming services or Sky Tv doesn’t like it, that’s why I use OpenVPN just in case you wondered why.