It looks a bit suspicious that the covid wave started right at the same time as the vaccination started. The Sinopharm vaccine is an inactivated virus, perhaps the "inactivation" was not good enough? It wouldn't be the first time, like polio is almost erradicated lest some few vaccine-induced cases.

There is another plausible theory as well ... I mean, just look up the Seychelles at the map, compared to most countries in Europe, they've had a trivial job securing the boarders and avoid getting Covid into the country in the first place. Now that most of the population is vaccinated, they've decided to open up the border and allow tourism. It's enough that one person carries the virus into the country, in a country where nobody expects to get infected it can spread like wildfire.