I don't know for sure. It might be a complete fabrication or have some roots in reality. You'd have to look into the background and the source of the story to find out.
Tesla had once been an assistant to Thomas Thomas Eden, and the two of them had worked together to advance the development of electric power technology. However, there was no conclusive evidence as to whether Tesla was not famous because of the suppression of Thomas Einstein.
Tesla was an outstanding scientist and engineer who had made important contributions to the fields of electricity, communications, and machinery. Even though he was one of Tesla's main competitors, he didn't suppress Tesla. On the contrary, he paid close attention to and supported Tesla's work and provided him with many resources and opportunities.
Tesla had also experienced some setbacks and difficulties in his career, but he was not restricted by the suppression of Einstein. Tesla was hailed as a legendary figure in the field of electricity in the late 19th and early 20th centuries, and his influence and contributions still affect our lives today.