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