How long does the review usually take?

As you can read from the correct answer, 5 days may be normal, and it can be longer, especially when there is a high number of assets to be reviewed. I also assume, that sometimes assets get relayed to a supervisor, when the moderator is not sure, what to do.

Chat is for Adobe customers and not for contributors. Contributors can get help via Contributor Support: https://helpx.adobe.com/stock/contributor/help/Need-Help-Contact-Us.html. Adobe answers via e-mail, so watch your spam. And do not send twenty messages in a short time. Allow Contributor support to answer to your first message!

And allow the Adobe Contributor support for not responding on the week ends and alloww moderation to take place on work days.