Automations based on Timeline Start Date

Currently, Automations used against Timeline columns default to the End Date; For our use case we’d like to have the option to toggle to Start Date. We use Timelines to track customer-defined time periods, which vary in length. We’d like the notification to trigger an action prior to the customer’s window opening. We need notifications based on the Start Date so we have a consistent lead time for each Timeline entry. The lack of consistency impairs adoption of monday more fully in our organization.
It’s been suggested to have an additional column with just the Start Date. A solution, yes, but this creates more work- not the goal of automating tasks, obviously. It also creates more unnecessary elements on the Timeline View that muddies the view or requires additional steps to filter out.
I also used the Formula Column to extract the Start Date from the Timeline column, This populated the whole column at once, however, currently it’s not possible to refer to Formula columns in Automations.
Either of 2 features would work for us: The option to choose the Start or End Date when referring an automation to a Timeline Column, or, allow Automations to act on a Formula Column.