Can I hide the widget for out-of-stock, unavailable or preorder products? (Essential Estimated Delivery Date app)

There is no built-in setting for this. Stock, variant availability and preorder status don't decide whether the widget shows. It shows on every product that matches its Placement. (Stock is only used for the {stock_left} variable in the description.)

What you can do:

• Target only products that ship normally. Set the widget to Collections or Specific products and leave out your preorder or made-to-order items.
• Show a longer estimate for preorder items. Put them in a collection and create a separate widget for it with longer processing time. That widget takes priority over an All products widget.
• Hide it on sold-out variants. This depends on your theme. Contact us and we'll check whether a small custom CSS change can do it on your store.

If you'd like this as a built-in option, let us know and we'll add your vote to the feature request.