Any biological effect on the relative speed at which individuals age would be far dominated by the actual huge increases in average population age that countries are seeing (e.g. the mean age in Germany is now over 45 years). Not only does an older population mean a more conservative population, because people on average are more conservative when they're older, but an aging population also means each young person has to support more and more retirees, putting an increasing burden on the living standards of Gen Z that causes some to doubt the fairness of the system they inhabit.