Anyways, it is known that Reverse-transcribed SARS-CoV-2 RNA (the virus itself) and other virus has been shown to integrate into the genome of cultured human cells and can be expressed in patient-derived tissues. So it is to be expected that the vaccin based on RNA can do the same. They just needed to proof this.

FWIW this was in culture human liver cells. Sometimes these cells do not behave like normal cells. This could make them more prone to integration of foreign DNA sequences. STILL, they did demonstrate that intergration of Pfizer jab gene sequences is is possible. To approve this jab without the necessary studies is criminal.