Linking a social account isn't enough on its own — Autodomme needs your Microsoft account connected before it can see when you complete a task and message you about it.
Autodomme reads your tasks from Microsoft To Do. To message you when you complete a task, it needs two separate things connected: your Microsoft account (so it can see your tasks and notice when you finish one) and a delivery channel such as Bluesky (where the message is actually sent). If you have only linked Bluesky, Autodomme has nowhere to read your task completions from — so no message is ever triggered.