No, haven't got request for biometric or medical, because the case has not reached the 'In Process' phase yet.Have they done biometric? Medical? Although a decent sample size each case is not the same so unless you are comparing parents from the same countries it is tough to compare PGP applications.
I co-sponsored my in-laws in 2019 as well. They are from the same country, sponsored by the same couple with identical family income and family size. Their application was received by Ottawa on June 28 2019 and is also being handled by the Mississauga site. It became 'In process' half a year ago, biometrics was requested then and medical was recently requested. See the disparity?