No wireless charger will work with an EMF case. That's what EMF is, Electro-Magnetic Frequency, which is how a wireless charge connects. If you're blocking all EMF, then nothing will get through to create the necessary charging process.
In theory no, but depending on how your “emf case” is built it may let through some intensity and frequency.
(And here is a well-intentioned but risky potential black hole to off topic hell: I hope you are not really depending on that EMF case to protect you or help you with anything important )