Is this a subdeck? What are your limits for new and review cards per day?
If you have a number of review cards over your cards per day limit, new cards won’t show up until you have fewer reviews. In the deck options there’s a toggle that tells Anki to ignore limits for new cards, maybe that’ll help.
This problem is affecting subdecks and main decks.
For example, for some subdecks, I can see that there are new cards in my subdeck, but when i try to do them as part of a bigger deck, it shows that I have “0” new cards.
Also, what is this toggle called and how do I alter it?