Aetherytes are large aetheric constructs. The fact that they've stuck around in both societies would seem to suggest that elements of their magical know-how were preserved into post-sundering society, at least for a time.

There are plenty of things that you can achieve with magic in place of technology, though. We know for a fact that they used aether to directly fabricate clothing using Creation magic, for example. What need is there to invent a loom in such a society? That's something that would need to be developed from scratch. Likewise, just because you have the knowledge to make an aetherically driven vending machine or an aetherically powered light source doesn't necessarily mean that you'd have the silicon manufacturing or metallurgical tools needed to build one by conventional means.

As for the moon and the Loporrits, it's hard to say how much engineering knowledge the smol rabbits had to develop for themselves over the past 12 000 years. We know that the Amaurotians themselves hadn't developed spaceflight, with the Convocation having limited knowledge of the celestial prior to Hermes being appointed to Fandaniel's post and Meteion being their very first foray at space exploration. It sounds funny when you think about it, but the Loporrits are actually more technologically advanced than the Amaurotians in this regard, simply because they were specifically tasked with a mission to develop spaceflight.