Hi there and welcome to the forums!
I’m afraid there is no way you can customize that list.
One work-around is to enable Write and click the control/parameter on the VST you want an automation lane from. This should create a lane right away without having to search for it in that list.
Just to clarify, the idea is to record some automation data for the VST you’re using. A single data point is sufficient. This recorded automation can then be deleted as we only did this step to bring up the automation lane.
If you don’t see the automation lane(s) after you recorded automation, try using the command “Show All Used Automation”. You will find that command by right clicking any track in the track list.
You put the track in Write, but you also need to let the project play for just a second, and while it’s playing, use your mouse to tweak the knob you’re insterested in automating. If you have the option “Reveal parameter on write” checked in the Automation Panel’s (F6 to open) “Settings” Tab, the automation lane will show immediately.