Yes, ship station should import the ebay ship by date from the API with the order.
Currently this whole column is blank for eBay orders in shipstation, but it is filled in as expected for Amazon orders and their is no reason why eBay orders should not have this very important fulfillment information.
For your developers: Using the eBay Fulfillment API this is very straightforward. Their is a call "getOrder" as per documentation at: https://developer.ebay.com/api-docs/sell/fulfillment/resources/order/methods/getOrder
Which has a responce directly for this. It is "shipByDate" (lineItems.lineItemFulfillmentInstructions.shipByDate) which returns the date shipstation would use to fill this column in directly.
OP: Feel free to add this to the original post to give it more sustenance for supporting user votes as well as ease of implementation for the devs.
I use an automation for this when orders are imported to set it to 1 day after the order. However, that works fine, but you can't exclude weekend or holidays. You would think that they would have it set up to be for "mailing days"
For eBay and Amazon orders, we need to see the deliver by date. Prefer it to be in the Shipping info column. So we can see the date and choose which shipping option will make it on time.
Right now, we have to click each eBay order 2 times to get to the delivery by date page. And click 1 time to the Amazon order. Doesn't seem like alot, but it's wasted time waiting for hundreds of orders to load the date.