No, the fungi give them access to the subspace mycelial network which they can navigate/transverse in order execute what is basically galactic-scale teleportati

No, the fungi give them access to the subspace mycelial network which they can navigate/transverse in order execute what is basically galactic-scale teleportation. Yes, this is gobbledygook. But no moreso than regular "subspace" or anything else in Trek. For power (ed: including their standard warp drive), the Discovery still has a plain old M/AM reactor. And yes, I did just use the phrase "plain old M/AM reactor" hah