you have to change deck options for each deck individually. changing deck options for parent deck, doesn’t change deck options for subdecks automatically.
also parent deck review/new card limit also applies to the children decks too (if your parent limit is is parent deck limit is 20 card limit for one of the subdecks is 9999, you can’t review more than 20 for the subdeck too)
if you edit an options group, it’ll affect all decks using that options group.
I had the decks set to 9999 under a parent deck. I’d not changed this parent deck new card option. Moved my sub decks to their “own new parent”/level. Now all my cards appear.