Siri (HomeKit) volume

Hi. I am new with home assistant and hope to post no mistake here. If so, sorry. First homeassistant work here as docker on my qnap. I Switche from homebridge and want to give Home Assistent a try. Two questions.

  1. is it possible to control the volume of the denon receiver (integration denon AVR network) with Siri ? How ? In Standard Installation it is Not possible.
  2. is it possible to control device buttons from harmony over siri ? (Harmony integration). In standard installation you just can start a activity.

Thank you for you help or link where I can try to look for further information.