ShipStation - Shipment Dates Being Populated by ShipStation in Dear for Sales

Can we please have the fulfillment date from ShipStation populate in Dear for sal order?
This is using the Custom Store for ShipStation.

Currently, in Dear, we have to use the ship date which isn't accurate since the date of the actual shipment/fulfillment is created in ShipStation and NOT in Dear. 

For the shipment date, you can only use "today's date" or "invoice date." I have not seen Dear update the shipment using the invoice date since once the shipping tab is fulfilled from ShipStation it gets authorized.