@Roma Pikmin 4 has managed almost 3.48m as of March 2024 and is probably close to 4m by now. I'd say that's really solid though, considering how it launched late in Switch's life. Could maybe reach 5m in its lifetime. It's definitely a record for Pikmin (to be fair, every other numbered entry initially launched on a low-selling system).
Can't speak too much on Dread & Prime, but at least Dread is the best selling Metroid game, I believe. Prime probably could've done better if it was launched during the holidays and wasn't shadow-dropped.
Pikmin & Metroid are just niche franchises, but Pikmin 4 has done well and Prime 4 should do well too.