They’ll roll over from Path of Exile.
Path of Exile 2 has a new map stash tab for your Waystones that can be bought from the in-game store. It can hold up to 576 waystones of each tier and can be customized to always send waystones to the correct stash tab even if you have a different tab open.
There is good news for PoE 1 customers. If you happen to own any map stash tabs in Path of Exile 1, they will be available in Path of Exile 2.
MMO Fallout 