"Show VCA items" is a function which works in Internet Explorer 11 with the Bosch MPEG ActiveX installed. Due the end-of-life of Internet Explorer, this function is no longer available on Microsoft Edge.
ONVIF control of the thermal DZ was never planned for the MIC-9000i in the launch of the product. However, you can get the Pan and Tilt via ONVIF Device Manager to work by enabling the PTZ configuration of the stream.