I've seen as many people lack a sense of belonging in completely homogeneous groups. It doesn't take a diverse group to challenge a culture of connection.
Belonging is a function of conversation. People feel a sense of belonging when they feel like their stories are appreciated, ideas and efforts valued, learning shared and feedback useful. This can happen in any constellations of generating and color, background and foreground. None of these are the exclusive domain of any demographic. They are possible for any human being with even a minimal growth mindset.