looking for a case for my new ipad pro 13 M4 that is compatible with the magic keyboard

If you are looking for carrying and protection in transit, any suitable size slip case or messenger bag should be adequate.

Unless you will be using your iPad and keyboard in wet or very aggressive (industrial?) environments the Magic Keyboard probably provides enough protection. If you need impact and water resistance while using it might be difficult to combine with the Magic Keyboard, it would be better to use the iPad standalone with a heavy duty case from one of the third party suppliers. No promises on this but Otterbox would be the first place I would look.

If you need really robust containment for delicate equipment with foam padding for transit (airport baggage handler resistant, floats, etc) try one of the industrial case manufacturers. I usually use Peli cases for this level of protection but they don't come cheap.

So, I’m just asking, but when do you want to use the case? I looked (see picture) and it looks like the Magic Keyboard is a case as well as a keyboard.

-CPistol

So do you want a different one, or is that one not usable anymore? I will look around and see if I can find one.