I see that there is a new firmare for RBK850 to enable parental control. The firmware is v4.6.3.9.I downloaded this firmware and installed it. https://www.netgear.com/support/product/rbr850.aspx#RBR850%20(Orbi%20Router)%20Firmware%20Version%204.6.3.9https://www.netgear.com/support/product/RBS850.aspx#RBS850%20(Orbi%20Satellite)%20Firmware%20Version%204.6.3.9 The only "nasty" issue I see with this firmware is that wired satellites don't work. :) The wireless satellites work well.Otherwise all is so far so good.

Factory reset of the Router solved the problem with wired satellites. :)

RBK850 Series - Firmware Update v4.6.3.9 - Issue with wired satellites

FURRYe38
Guru
Aug 13, 2021
https://community.netgear.com/t5/Circle-Smart-Parental-Controls/Parental-Controls-missing-on-RBR850/m-p/2127544/highlight/true#M4850
ekhalil
Master
Aug 13, 2021
It's important to know that downgrading back to v3.2.x.x is not possible in the Orbi Router. The Satellites are ok to downgrade.
So once you upgrade to v4.6.3.9, it seems that you will be stuck on that firmware.
Also note that Orbi Router v4.6.3.9 will work with Satellites on v3.2.x.x. All Satellites will appear as disconnected.
- FURRYe38
  Guru
  Aug 13, 2021
  https://community.netgear.com/t5/Orbi-AX/New-RBR850-RBS850-Firmware-Version-v4-6-3-9-Released/m-p/2127545/highlight/true#M18252
ekhalil
Master
Aug 17, 2021
Factory reset of the Router solved the problem with wired satellites. :)
- FURRYe38
  Guru
  Aug 17, 2021
  Thanks for letting us know. Glad that was all.