Nintendo is pretty random with their treatment of IP sometimes.
Clubhouse Games was a silent hit on DS and went into hibernation for 15 years to reemerge with a sequel that’s been another silent hit on Switch. We’ll probably be waiting until Switch 3 or later for a follow up.
Mario vs DK is a series that has never done particularly well, but got a few sequels on DS, 3DS, and Wii U with a remake of the original set to release in less than a month for Switch.
Tomadachi sells well and would have been perfect for the crowd who fell off Animal Crossing that just want something silly and fun to enjoy. Certainly feels like a miss, but maybe it’ll be back for Switch 2.