The trope about SAS being required is pretty old... people trotted that out when I last worked in pharma ~15 years ago. The FDA specifically released an article saying that R is perfectly acceptable for submission https://blog.revolutionanalytics.com/2012/06/fda-r-ok.html
Please don't spread the SAS FUD. I work in Pharma and talk to the statisticians all the time.
[0] https://www.r-consortium.org/blog/2022/03/16/update-successf...