If a community isn’t reaching critical mass, you might be tempted to expand its scope, drive more people into it, and hope it takes off.
Alas, it never works.
If you can’t engage the members you have, you’re unlikely to engage the members you don’t have.
A better approach is to go narrower. Reduce the scope of the community. Focus on a more niche target audience or topic. Better understand the unique needs of a smaller, more connected, group of members better. Figure out exactly what they need, desire, and what identity they share.
Then start building out a community from there.
If it’s not working, it doesn’t make sense to go broader. Try going narrower instead.