Orders without a delivery date or time window are still fully routable — EasyRoutes simply optimizes them for the shortest, most efficient path instead of constraining them to a window. You can mix dated and undated orders on the same route: those with windows are sequenced to honor them, while the rest fill the gaps. Use Order Filters to include or exclude undated orders, and add a window manually to any stop when you need one. This applies to both EasyRoutes for Shopify and EasyRoutes for Web.
See: Time Windows · Order Filters