This seems unlikely, because scientists would use viruses they know to be deadly, not the existing viruses in bats; while the rna string resembles most that in bats - not that of SARS or MERS. Source sciencedaily
Edit - after sourcechecking a bit more I found this has been published in Nature, which means it's been peer reviewed https://www.nature.com/articles/s41591-020-0820-9
Which reminds me how interesting molecular biology is
PS - I think about all people as well - and hope for the best possible outcome... This darned virus certainly took us by surprise...