Setting the correct expectation is always the first step to ownership, in my view. If something cannot be delivered or not within the promised timeframe, an explanation (not excuses) is deserved, as well as a revised timeline - but it should never get to that point.
It should be communicated as early as possible in the piece in order to avoid that situation from happening in the first place, and for the correct priorities and outputs to be reset.
You say it well, not much to add really. Thanks for your input and joining in the conversation.