Eberron is a Fantasy Setting, not a Sci-Fi one. Sci-Fi shows can have lower budgets because more of their world can be bought off the shelf and disguised slightly.
Eberron is more like a Star Trek than any other D&D setting (yes, including spelljammer).
No more so than any other fantasy show, and possibly less than some others. And every studio has truckloads of props from the late Middle Ages to the early modern period.
If you don’t see quotations, the poster I’m replying to has you on ignore or you have them on ignore.
Really? Eberron has skyscrapers, street lamps, trains, and plenty of other magical equivalents of real-world technologies. Sure, it would take quite a bit of special effects and costumes to make it look good and unique, but I can't imagine that it would be outrageously expensive compared to many popular Sci-Fi and Fantasy shows/movies, like Loki or the Mandalorian. It's not like every shot of the TV Show would take place in the streets of Sharn. Plenty of it would take place in the low magic countryside or ordinary-looking buildings/structures.
What you need to look at is Andor. I think something of that level could do Eberron justice. It also depends on what king of Eberron story you want to tell.
Eberron also has the fantasy equivalents of RL tech and scifi tech in it. The most notable being the Warforged.
given how much they paid for the rights to use the annals of LotR, the inefficient use of funds started right then and there
Any decent writer could tell stories in these themes in every significant D&D setting
