We are pleased to announce that the first set of Power Query features are now available in version 16.29 and greater. At this stage you can refresh from text, CSV, XLSX, JSON and XML files.
Refer to the following blog post for more details:
I encourage you to try the new functionality and share your feedback with us via Send a Smile/Frown at the top right corner in your Excel for Mac.Thomas Wilk commented
it would be nice to have Power Query and other data analytics add-ins available for the Mac OS.