@anon29275264 - For now, only some of the pre-built automations outlined here support mirror columns. For the original post’s workflow, I’d suggest this pre-built automation:
From the “Another Status” (which would be a normal status column on your board) you could build your automation to create a subitem.
Basically, we’d start with “When ‘mirror status’ changes to something, change ‘normal status’ to something” then “When ‘normal status’ changes to something, create a subitem”
That also means that this part of my original reply was incorrect:
I’ll keep an eye on this thread - please let me know if that works!