Isn't this supposed to be هناك مطبخ في الطابق الاول
As a native speaker I agree.
Or يوجد
If they're so concerned with word order than they should have had "هناك" for "there". Unreliable.
There is = هنالك, so yeah, I can agree
في الطابق الأول يوجد مطبخ OR هناك مطبخ في الطابق الأول the sentence Duo created is completely wrong
Why not (mathbakh fee atthabik avval)
This sentence stucture is fine and commonly used, the only issue is that the word Taabiq should be pronounced Taabaq.
The issue is that the harakaat are completely off, since Arabic words aren't supposed to be read individually as they are here when you select the choices. The pronunciation differs based on the sentence.
Thanks for the explanation