I believe this is the only part that really matters.
Not everyone on a dating app is going to meet their twin flame. It’s arguable whether everyone has a twin or not. That doesn’t mean that you can’t meet on there.
Given the 3D dating culture, it’s probably going to be more and more common. Not because the twin flame idea evolves, just because it doesn’t care about how, why or when you meet that way.
You’ll get some people who try to judge or compare, but leave them to it. Their judgment comes from ego and won’t impact your journey at all.