"When Subitem is Created" Automations

I really need the automations that are available to the main items to be applicable to the subitems.
For example:
When SUBITEM is created, and only if STATUS is X, Change STATUS to X

Relevant case: I create subitems on a parent board and then through a change in status, it creates an item on a child board and connects them. I have a button that automatically creates two of the reoccuring needed subitems (there are other subitems that are not reoccuring) and I would like it to automatically send it to the child board and connect.