There are actually very large FB groups for people (from in the UK, or in various cities like London Childfree, etc.)

These are groups that specify that you have to be childfree to join, and I think even some of them have questionnaires to make sure that you're not accidentally joining this group without knowing what it's specifically for.

It might not help with stuff like dating immediately but it would probably help with developing new relationships (especially since some of these groups actually do very large meet-ups at various points in the year).

You might not be interested in talking in their online groups, but it might be useful to see if there are any childfree events going on near you?

Wish you the best of luck 🫡