Anki: A LOT of "unseen" cards, is all well?

I am a pretty heavy user of anki (1-2 hours/day), and am confused by a statistic and a behavior.

fwiw, I use the templates from Gabriel Wyner/Fluent Forever.

OK, here is the question: What is the "unseen" card count in statistics?

I understand it to be the number of cards I have created but have never seen.

I do think there are a lot of these (I currently create 15-50 cards a day).

I am confused because I think there are cards from a week ago that I have not yet seen, but when I add new cards, I often see them right away.

How do I understand this more fully?

(Apologies, I flipped Anki into Hebrew mode, but it is pretty understandable)