Well done on your CFO adventure.
You'll be making your BRP application as part of the FLR(M) application.
You can’t apply for a BRP on its own - you can only apply as part of your application for FLR(M) or ILR
Biometrics will be done at your nearest appropriate Post Office if you apply FLR(M) by post or at a premium service centre if you apply in person.