I would expect that the status is on some public facing web page and that when it changes it will be updated fairly quickly.
I'd also expect that who you message at the editorial level won't really matter as you will most likely be answered by clerical staff using some boilerplate response that might be informative or not. Whoever you email will just pass the request to the journal's staff.
I'd also recommend not sending any message if it is just for informational purposes. If you have a real need to know, not just unease, then do so. But too much messaging by too many worried authors will slow down any process.