We use does and is with third person singular pronouns (he, she, it) and with singular noun forms. We use do and are with other personal pronouns (you, we they) and with plural noun forms. For the verb be, we need is or are as
Are we grammatically correct?
It's grammatically correct, just not so frequent as So are/do we all.
What is the difference between are and do?
In both the sentences, you can see that the form 'are' is used again in an interrogative sense, and it is used in the case of the third person plural number. ... On the other hand, the verb 'do' is also used in the formation of interrogative sentences. At the same time, it is used in the case of second person.