While testing org-cite a few weeks ago, I noticed by default bibtex won't run with natbib export, or biblatex with biblatex export.
Since org has not had native citations, this is not surprising. But with org-cite coming soon, this will change. At the time I suggested changing default to use latexmk, which will handle both bibtex and biblatex runs. https://lists.gnu.org/archive/html/emacs-orgmode/2021-05/msg00486.html So what do LaTeX users think about changing the default for "org-latex-pdf-process" to "latexmk"? Is there any reason not to do this? Bruce