Sadly nope. I still think she might be a possible romance and maybe even have her own ending where you end up with her and what you did to Jake its 100% gonna have consequences with her, but not yet. I guess we’ll see her when we return to the normal world hopefully in the next update. But i also thought we were leaving in this one, so maybe not. (i hope we can stop taking L’s after that massive last one)
Mia will obviously be part of the mc's harem at some point in the story, she and the other girls have relationship points. I recommend leaving Jake alive, surely it is the best option for a future romance with her. Besides, it will be beautiful to see how we make NTR to the idiot Jake.
Surely Weirdworld is waiting for the right moment to give a proper development to both mia and its route.