Subitem Dependencies

Does anyone know how to use a workflow or automation that allows Monday.com to recognize the next item or subitem and automatically trigger a notification on that next item or subitem once the item or subitem above it is marked with the status as done?

We’ve tried subitem automations, workflows and are preferring not to use dependencies (selecting by name of item vs. an item number without multiple connections or mirroring isn’t worth the effort).

This is a simple functionality we can’t seem to crack and we’re having a hard time understanding why a PM system doesn’t have this built in. Is there an automation or workflow we’re missing here?