Can it be "Milyen ez alma"?
That is not good. "Milyen alma ez?" can be "Ez milyen alma?".
That's just "what kind of apple?"
That is "Miféle alma?"
Did you edit your question? "Milyen ez alma?" is not correct. I remember replying to "milyen alma?"
I did, but like a minute after posting it and seeing the mistake
this language is so confusing
Milyen alma az ez? - would that do?
It would go 'Milyen ez as alma? '
That makes sense (Milyen ez az alma) but means something else (What is this apple like/How is this apple)
Nope, az doesn't have a meaning that would be any suitable here. Do you misunderstand it for "az" and "is" being related? Just guessing.
Could it be "milyen fajta" instead?
I think so. Just like Miféle :)