Hey mashed potato brain, most people had COVID exposure prior to the vaccines becoming available. Hence, long COVID symptoms like blood clots, myocarditis, and lung damage will occur in both groups.
The vaccines boost the body’s immune response during initial COVID exposure / contraction while minimizing symptoms over the short and long term from that infection. If a person had exposure prior to the vaccine, as many people did, then those people should expect long COVID symptoms across the rest of their lives.