Apparently I have a different understanding of "explain the tech" than you. I am pretty sure, for instance, no movie explained how the Death Star gets the energy to destroy a planet, let alone move faster than light.
Rogue One explained the power source as did a New Hope (to a lesser degree).
All the movies touched on hyperdrive and explain how it works in general terms (as much as such a thing can be).
"So you've come to the end now alive but dead inside."