I agree with the general premise that two diabetics would have a lot in common. That doesn’t mean that they are adequately compatible; as religious beliefs, life styles, political leanings, etc, etc., all are part of what makes a couple “compatible”.
I was married for over 22 years to a non diabetic. I found out I was diabetic after 6 years of marriage and it was very tough on the whole family. Traumatic, actually. Eventually we got divorced, but the fact that I was diabetic was a tiny, tiny portion of the reason we split.
A few years later I met someone also diabetic and through that common connection, we got together. It was a “spark” that ignited our friendship. However, we like a lot of the same things, and all of those things combine to make what I think of as, “compatible”. Likes, beliefs, attitudes, and conduct are similar enough for us that we’ve now been together for over 20 years. We have large stashes of diabetic supplies. LOL!
Good luck in your dating, but don’t make diabetes a requirement for whom you choose to date.