While we check the GMB for new reviews daily, but you need to be aware that we can only grab the review when it is available through Google API, which might not be instant. Or it could also be that we checked the API today and a review was made available in the next hour or so. That means we will pick that review up the next time we get back to the directory listing, which will be the next day. So the time of how fast the review becomes available in the Review inbox and review pop greatly depends on how soon it's available through Google API.