Yes, there are usually 2 micro deposits received. Did you confirm back the one you did receive.
I would contact eBay Customer Services, but only very first thing in the morning on a weekday when the lines first open at 8 a.m. as there's more chance of Dublin answering. Ask them if another micro deposit is on its way or could they send another.
This is the easiest and quickest way to contact eBay Customer Services, for a Call Back option.
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
Lines open 8 a.m. - 10 p.m. on weekdays
9 a.m. - 6 p.m. on weekends.
Automated agents will be available on chat outside of the above hours.
I recommend contacting CS first thing in the morning as there's more chance of Dublin answering.
@anna-rosmcchesne_0