I don’t think there is a set time for the “Fiverr review” period and if it’s done manually it might take longer over holidays or weekends. It’s also possible that yours got caught up in an editorial focus evaluation. If it was related to SEO (i.e. your username) those gigs often get more scrutiny. If staff doesn’t like the wording but it’s not a big issue, those gigs don’t always show up in search at all.
I’d wait a week and if it’s still not there, ask Support to check the search status. They will likely tell you that there is no guarantee you will appear in search, but they might give you some useful feedback too. Just don’t contact them before a week has passed since you don’t want to hassle them.