They are Rotom, who shape-shifts. That's not at all comparable to this, a brand new version of a Pokemon's design without any in-universe explanation. And, even if it was, it'd confirm that they are, in fact, Pokemon in some form, because that's what Rotom is.
Floating static objects and animated, moving, expressive, sound-making, sentient creatures on her head are two very different things as well. Magnetic levitation does not explain any of this. It would only explain if they were floating in place somewhere.
I don't particularly think "drones" explains any of this well either? That could explain the flying around, although it's a very very convoluted explanation (Occam's Razor), but that's not going to explain the sounds, expressions, or why they chose to redesign a Pokemon and put all this effort in if it supposedly doesn't actually exist. "Drones" are also not what she calls them, to be clear, if we really are taking her stupid "hairclip" comment literally and not allowing them to be anything else.
They also don't "look like Magnemite". They are a complete redesign of Magnemite, with sounds, movements, animations, and expressions all made specifically for this redesign. The redesign also makes perfect sense as a redesign of said Pokemon, with colors based on polarity. Calling than "nothing more than (anything) that looks like Magnemite" is simply incorrect.
I know it's a Paradox form. However, I don't see any reason to think it's the types you mention here and "I heard rumors" is not evidence for that. Do we see it in the leak? Do we have pictures? Otherwise, I'm going to take what I see from official media lol.
Magnemite and Magneton are interchangeable here, depending on if we think they are meant to be interpreted together or not. Could also be a Wiglett sort of deal and be its own thing. It's all essentially the same thing in my eyes. This distinction doesn't actually change anything about if it's a Pokemon or not.
We're not talking about her partner Pokemon. Trainers can have multiple Pokemon, assuming these are meant to be hers.