I think Nintendo’s approach to the mobile market has always been more about brand awareness to drive people to their dedicated hardware and that is achieved by smartphone games that have long life. I don’t think Nintendo ever planned to do what other companies do in the mobile market such as releasing dozens of games for one IP (I.E. Square enix releasing a bunch of Final Fantasy mobile games).
I think Nintendo’s plan was release 1 mobile game per IP, so in that regard their release schedule for mobile games was always going to end up declining since they have no interest in releasing multiple Animal crossing mobiles, or Mario Kart mobiles etc.
.
