Two of every species, or evolution after the flood?

I’m genuinely curious how people reconcile these two positions.

If Noah did not literally take two members of every individual species onto the Ark, then the usual explanation is that he took two of each broader “kind,” and the many species we see today descended from those original kinds afterward.

But if that is the explanation, how is that not evolution?

For example, if Noah took one ancestral “dog kind,” and wolves, coyotes, foxes, jackals, domestic dogs, and other canids diversified from that ancestral population after the Flood, that requires inherited variation, mutation, selection, reproductive isolation, and speciation. Those are evolutionary mechanisms.
And because the Flood is supposed to have happened only a few thousand years ago, this would require an extraordinarily rapid amount of diversification in a very short period of time.

So what am I missing? It seems like there are only a few possibilities: either the modern species already existed and Noah had to take representatives of every single species onto the Ark, or broader “kinds” diversified into many species afterward, which is evolution, or there is some third biological mechanism producing new species that I’m unaware of. What is that third mechanism?