RSS missing from build deployment

I have a Hugo build https://app.netlify.com/sites/corexpert-sg/deploys/5f3b6e83ea5fe50008cf951e that uploads, but not the index.xml (RSS feed is missing)

I have no idea why! When I build locally from a clean environment, public/index.xml appears correctly.

So why isn’t index.rss one of the build files?

https://s.natalian.org/2020-08-18/build.txt

hmm, interesting.

any chance it is being .gitignored? that does happen sometimes, its worth checking.