I believe you have confused the refueling probe hatch with an IWB hatch.
but also that little bay near the engine looks like it could hold a missile too, obviously it couldn't, but why does it look like a missile bay?
I don't see how there is a convention or rule where an IWB must look like an IWB, and vice versa.
View attachment 161568
also, I'm not sure if I'm just retarded. But how does the wheel go back into the aircraft when it's like this, instead of being directly on the bottom. Like the J-20.
As per explained by @Kejora above.