Multiple aerials on Wifi6 Router

Im considering purchasing a Banana Pi OpenWRT router.

My previous devices have all had internal aerials but this device has four connectors.

Knowing almost nothing about Wifi 6 and aerials How feasible is it to run extensions from one or more of those aerials out the wall of our house and use a larger uni or directional aerial to extend coverage in a particular direction from a high point or should you always have the same short aerials that come with the router?