Hi Joy, they have reappeared today, so maybe it was a temporary Google glitch or something to do with the data transfer connected with the ongoing updates to the new Google Search Console - if GSC has any connection to Google My Business that is?
When they reappeared today, I also noticed a review is now showing on our listing that I haven't seen before or received any notification for. It looks like it is for another business in the same space, so something must be getting updated in the background?