I am having the same issue. I can not connect any devices such as a Logitech Circle View Doorbell or Kasa HomeKit smart plugs. It seems any device that needs to be added directly through HomeKit populates the same issue. I have 2 Eero Pro 6’s that had all the devices at one point connected but over the past week all of them will not reconnect. Eero states they are seeing the attempts to connect with the wrong password but HomeKit does not allow me to enter the password manually. I have tried with HomeKit security on/off as well as removing Eero from HomeKit. None of the solutions have worked as well as having Eero use the out older software on the device. This seems like HomeKit might have a bad handshake with the new update. Apple please check this out to get it corrected in IOS 16.2 or 16.1.3.