UPDATE: I managed a workaround for now for the font changes in the PDF files. This was by manually ediiting inject.js in plotly-graph component of the orca package to include MathJax’s font config options.
Also as a word of note, the STIX-Web default is a good idea to cover a wider set of characters, but this workaround is for those folks who are looking for consistency while publishing. FYI, MathJax only supports upto a certain amount of fonts.
Cheers.