Openning EarTrumpet without pressing the icon

[Scarlaid]

Everyone might be familiar with shell:(process) or ms-settings:(setting name) which was used alot for Rainmeter skins interaction, which is to execute to open a Windows app, or a flyout, like ms:actioncenter to open the Action Center through a click

I was wondering what the command for EarTrumpet to open the volume flyout?
for reference if confused