The reason that neurodivergent became a term is that it also includes people who are slightly different from normal, but not necessarily diagnosed, or diagnosable.
Using these as your primary love indicators is odd, not bad, just non-normal. It's common amongst NDs, but far less so amongst NTs.
Sending memes back and forth is a love language.
There's a graffiti near my house which roughly translates to: "And who sends memes to you? 👉👈" and I love it.