Yes this is definitely a part of it. And another part is the usual underlying question about how well the candidate understands and is prepared for the specific

Yes this is definitely a part of it. And another part is the usual underlying question about how well the candidate understands and is prepared for the specific job they are entering. Different universities have different kinds of diversity challenges: some have a lot of working students who aren’t in the traditional student age range, some have a disproportionately large number of deaf students due to the presence of a good program there, some have large numbers of students for whom English is a second language, etc. Each of these requires different skill sets and interests on the part of the teacher. And a DEI statement can be a way to show/evaluate how seriously the candidate is considering the actual on-the-ground demographics of the institution and the challenges it poses, as well as how the institution is trying the change demographics (whether for reasons of market demands or principle).