There's evidence that that is the role of the apendix, it functions as a refuge for healthy gut bacteria, even during antibiotic treatments.

And don't spread misinformation.

https://www.the-scientist.com/news-opinion/fecal-transfer-from-moms-to-babies-after-c-section-trial-results-68012

https://www.sciencedaily.com/releases/2019/09/190918131447.htm

>Scientists from the Wellcome Sanger Institute, UCL, the University of Birmingham and their collaborators discovered that whereas vaginally born babies got most of their gut bacteria from their mother, babies born via caesarean did not, and instead had more bacteria associated with hospital environments in their guts.