The plan is that BugBot won't nag about mismatched access severity/severity when no-plan-to-ship is set, but that work hasn't been done yet.
Bug 1802201 Comment 5 Edit History
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The [plan is that BugBot won't nag about mismatched access severity/severity when no-plan-to-ship is set](https://github.com/mozilla/bugbot/issues/2435), but that work hasn't been done yet.