I realize this opinion presents an alternative perspective and might get some pushback. But I will offer it, as I believe it could help balance the discussion and be useful as a way to consider a different stance on the issue.
We have all-hands-on-deck staff meetings where new employees are introduced. But such meetings are infrequent, and can happen 2 or 3 months after the individual has been with the organization. It is also possible that if a few people joined in the same period, someone could be omitted by accident. Did the individual lose out in some way from not being announced in such a meeting? Not at all. The people who need to work with them already know about them, no problem. It is not a big deal if the announcement is made in a future meeting, or even not at all. They are not less a member of their team for it, nor are they paid less, nor recognized and acknowledged by their colleagues, immediate supervisor and leadership (at least no less than other new hires).
I wonder why is such recognition important to you. Promotion is what counts, not emailing everyone about it. Think about what's worse: a lot of rhetoric about professional growth but few actual opportunities for advancement, or promotion with some cracks in the dissemination process.
In sum, I view this situation as an opportunity to practice humility.
People like to think of themselves (or to have others consider them) as humble and not vain, only to agonize over missed opportunities to have their name proclaimed to the world. You might check what caused omission, but I wouldn't insist on this being 'corrected.'
To the point that 'official' recognition will somehow make a difference professionally, in terms of being able to justify taking on new responsibilities or supervisory duties.
My perspective is that those who need to know about your promotion for work reasons, will become aware of it one way or another. People also recognize and respect humility, and lose respect when they notice hints at the opposite. I would consider this, and err on the side of caution in this case.
Who knows, perhaps there is a good reason for this announcement not being made about you. Perhaps you will be better off from it in the long run, even though it may be less apparent at the moment.
For these reasons, I suggest to take a little more time, use patience, and see how things go. If there is clear evidence that lack of announcement of the promotion results in some disadvantage, then you can always follow up on it. It's never too late for that. Good luck!