Why can't Abandoned Checkout emails be sent for orders created via the Checkout API?

[DiscountNinja]

When using the Checkout API, orders are created via a "sales channel" that is not the "Online Store".

Unfortunately, the built-in "Abandoned Checkout" flow refuses to send out emails for orders that have not been created via the "Online Store":

Why is that the case?
Abandoned Checkout flows are an extremely important tool to increase the conversion rate for e-Commerce merchants.

How can we work around this?

[YourWords]

Did you ever found a way around this? I'm running into the same issue