Finale currently supports Square POS, Vend POS, and Lightspeed POS.
However, there is not a direct connection with QuickBooks POS at the moment.
If you are using ShipStation for your online orders, an alternative solution is sending your QuickBooks POS orders to ShipStation which will be synced down to Finale.
The order flow for this solution is QuickBooks POS --> ShipStation --> Finale.
More information on the QuickBooks POS / ShipStation connection can be found here.