This makes no sense?
M1 / M1 Pro / M1 Max / M1 Ultra were all manufactured on TSMC N5, even though volume production for N5P (improved N5) was already available by the time M1 Pro / Max were released. In fact, A15 (N5P) was released in September '21 whereas M1 Pro / Max (N5) were released in October '21 and Ultra was released in March '22.
M2 is manufactured on N5P, so it makes total sense that M2 Pro / Max / Ultra will also be manufactured on N5P. They're part of the same generation, so it makes sense to produce them on the same node.
This is also most logical from a financial standpoint: the base model M chips and the A chips are the smallest and therefore least expensive to produce on a new node with relatively poor yields and high prices. Once the node has matured a bit more (higher yields / lower prices), you manufacture the bigger chips (Pro / Max), and even later you print the big bois (Ultra)
M2 Pro / Max / Utra were never going to be N3.