Are you talking about the newsletter module? there we show only the lists that you've already synced in the component. So if you need to have a specific list in the module, go to the component -> lists and sync the list you need.

Regards,
Daniel

FYI, I had the same issue and posted here regarding my workaround:

https://compojoom.com/forum/bugs/21577-cmc-3-not-fetching-all-lists-from-mailchimp

It looks like the current extension only supports up to 10 lists. I would be interested in hearing from the maintainers if there are plans to address this or if I should fork the component and maintain my own version to address this.

Thanks for the response Daniel and Ben I appreciate the link. I ended up renaming one of the lists that was being shown in the '10 chosen lists'.

I'd be interested to know as will if there are plans to add more than 10 lists as it seemed to randomly select the 10 lists available.

Well add the change. We don't have more than 10 lists with our test account and that's why we didn't notice this.

Regards,
Daniel