Maker Cosplay? Do they dress up as MOSFETs?
If you use such a definition, a cosplayer who makes their own props and sews their own costumes qualifies for sure.
Some costumes require custom mechanical props. Spiderman's eyes in recent movies have the mechanical-quirk. So reproducing that mechanism in real-life is certainly a Cosplay + Maker thing.
There's a lot of Cosplayers using LED Lights for highly color-accurate "glowing" effects (common for high-end Overwatch Cosplayers). Some cosplayers are just sewing / stiching things (which is fine: that's still a skill), but there are other cosplayers who are putting serious effort into their electronic components of their costumes.
One thing that has historically put me off about the maker community is these artificial distinctions where materials and ways of making things that have historically been considered "girl stuff" get less respect, or sometimes don't even get recognized as making at all.