Turn the prototype in Adobe XD into a presentation in Google Stills or PowerPoint.

@????_???_6863 let's break this into two:

1. You can export your XD file as a PDF by selecting all artboards and choosing "Export as PDF." This PDF can be opened in various applications, including Acrobat Reader, PowerPoint, or any other PDF viewer.
2. You can 'share' a prototype. This link can be embedded on a website to 'showcase the prototype's appearance'.
   
   Unfortunately, direct export to third-party platforms like Wix, Weebly, and Squarespace is not currently supported.
   You can get a web developer or designer and use the prototype as a guide to build the actual website. Or use a plugins like Anima can export the prototype into HTML, CSS, React, or Vue.js.  But, you likely need a developer or designer for some level of customization and refinement.