Answer Guy on Nostr: We call those techno-fantasies Trappings, settings, and tropes of sci-fi, but lacking ...

We call those techno-fantasies

Trappings, settings, and tropes of sci-fi, but lacking plausible technological basis.

Star Trek and Star Wars are also squarely in that genre.

Frank Herbert’s Dune is more sci-fi, but verges on magical tropes.