There was a conspiracy theory about this. It was suppressed as a nonsense and miss information. I really find it very difficult to trust official authorities any more.
Was there any evidence at that time to support the conspiracy theory?
Yes, there was. There were early studies in rats showing that the lipid nanoparticles which the mRNA vaccines use concentrate in the ovaries and testes. There should have been biodistribution studies in humans before the vaccine rollout, but naturally those were skipped entirely. It was one of the biggest early red flags for me.