Waypoints = Maps

I had previously purchased a Map Stash Tab in PoE, and expected that all such stash tab transactions would carry over to PoE2. PoE2 has Waypoints instead of Maps, but they are essentially the same thing, used in the same manner.

Why isn't there a specialized tab for Waypoints like there was for Maps?

It is there, but hidden because it's not finished yet.
You can go to the settings and enable it to see it, but not use it.