One area that seems to be neglected in EA is community support for people outside of Europe/U.S.A.
It may be worth supporting wider regional groups for areas with a lower concentration of people interested in EA.
The idea is that over time people will join the groups and if they get larger, country groups can be created. At the moment people sometimes don't see a group for their country or it is abandoned and they are unable to coordinate.
This way people can indicate their interest by joining a group and when someone joins who does want to organise, they already have a network of interested people.
Here are Facebook groups for three regions I think are particularly neglected.
For completeness here are some other groups outside of Europe and North America.
There is this post - Why not to rush to translate effective altruism into other languages.
And this post I wrote where one conclusion is that maybe there should be less focus on location when thinking about movement building.
I'd agree that it makes sense to get it right first time but maybe that's one reason to have someone involved in EA community building able to filter and help people who are interested in EA in neglected regions.