Yes thank you so much!My friends parents recently got a PPR request for visitor visa. biometrics were already done just like your case. He submitted the passport pickup request thru vfs website link and paid 1729 per passport. You nned to upload the PPR letter at the time of submitting the passport pickup request. The packet only needs to have the passport but you can add a hard copy of the ppr letter for safety. to the best of my knowledge nothing else is needed. within 2-3 days someone will call and come to pick up the packet. You need to make to separate sumbissions if it is 2 passports (mom + dad). I hope that clrifies.
congrats on getting the approval