New preclinical data (TNBC) showing that a nanoparticle-simvastatin reduced lung mets https://www.cell.com/molecular-therapy-family/molecular-therapy/fulltext/S1525-0016(21)00357-9

It is hard to say if just taking simvastatin would be able to do the same, but there are some data (retrospective) showing reduced recurrence and mortality https://link.springer.com/article/10.1186/s13058-018-1066-z