How to present publication output on CV when you publish in fields where author ordering conventions vary?
I would suggest adding a remark like the following to your list of publications in your CV.


  I publish in multiple fields, with different standards for ordering authors, some ordering by contribution and others ordering alphabetically.  In the list below, first authors are indicated in bold when authors are ordered by contribution; the symbol = indicates a paper with alphabetically-ordered authors.
  
  [1] Bozo T. Clown and K. N. Zhao.  This is a chemistry paper. Science, 2014.
  
  =[2] Bozo T. Clown and K. N. Zhao.  This is a mathematics paper. Annals of Mathematics, 2016.
  
  [3] K. N. Zhao and 4278 others. Higgs bosons are made of cheese. Nature 2020.