VST CC7 Volume Issue

I cannot find where to change the CC7 volume for any VST instrument! Very frustrating.
When I press play Dorico resets and decreases the CC7 Volume control no matter what I do. There is NO expression map and even IF there is DOrico just does whatever it wants. Why would they do this?

I WANT TO control the volume of the instrument.

In the mixer, use the instrument’s midi slider or draw on its CC7 line in the lower part of the Key Editor.

Will try. Thanks, derBertram!