Moz does not index all link (s) at once, you have to give it time because as far as the link is indexable; it will definitely get indexed by Moz when the bots come across your site/content.
For example i had an article about Black Friday Deals and it took time for moz to index it, not because it wasn't indexable or there is any problem but rather it was indexed by Moz when they came across it; I hope this clarifies your issue.
