Will Wyze ever get indoor cameras to be integrated with the home monitoring system?

Your two indoor cams will record any event that you set them for in the Cam Settings any time they are on. This is not a function of the HMS but a function of the individual Cams. It will also depend on the subscription, if any, you have assigned to the cam.

An active alarm, an alarm countdown entry delay, arm to Home, Arm to Away, or Disarm are all events of the HMS. None of these can currently be used by the Wyze App Rules to trigger any action on any Wyze Cam or device. But, there is hope that Wyze will soon integrate the HMS mode change status into rules triggers:

The Wyze Security AddOn @alanizat mentioned is a specific “Plug In” module required to achieve certain Wyze integrations into the Third Party app\program\service “HomeAssistant” which is a Smart Home Control and Integration Platform that can pull together multiple ecosystems into one control dashboard. It is somewhat similar to the way Alexa requires the download and activation of the Wyze Skill to use Wyze devices in Alexa or the Link required by Google Home or IFTTT to do the same.