Powered up servo for direction ?

Hello, I bought the buwizz 3.0 bundle to motorize vehicles but I dont understand how I can handle the direction with the ports it has. I have not recieved it yet. All the references for servos that I find are power functions and I dont want to waste 1 of the 2 ports for that. So my questions are : - can normal powered up motors be programmed in the app to act like servos ? - if not, do you have a ref for a poweredup servo ? The only one I find is the one from lego and I dont like its...