What DAW are you using ? In Live 10, the Main Volume Control knob on ANA 2's GUI is responding to automation straight out of the box for me. You can then assign this automation to a controller fader/knob for some live recording volume automation.
Next to that there's also the dedicated OSCMixer section in ANA 2 allowing you to write volume automation per OSC which is a big bonus IMO, furthermore those ones are CClearn enable too.
That's my way to do it when it comes to volume automation with ANA 2 and I find the existing feature quite convenient already
Anyway, just my 2cts point of view here & SA team & the devs are monitoring the forums, so they will see your post too.