This map shows the evolution over time in the unvaccinated rate by World Bank income group. It shows how many people have never received a single shot and expresses that number as a share in total population. The number of unvaccinated people is calculated as the total population size minus the number of people who have received at least 1 dose.
Note that the jagged pattern in the upper-middle income line is due to the initially scattered nature of data releases by mainly China.