If at any point you need to give biometrics, you will receive a Biometric Information Letter requesting it, don't worry!
But as you already have MP and pre-arrival, most likely you don't need it.
I also provided biometrics before (for work permit) and my application shows the validity of those biometrics also. However I paid for the biometrics for the PR because I didn't know about the exemption, and I received a refund a few days after my AOR of the biometrics fee, because I am applying inland and therefore, based on the link I sent, I don't have to provide it at this point.