Although there is no direct 'export graphic' on the Power BI graphs and charts, it is possible to export pixel-perfect Portable Document Files (PDFs) using your browser Print function.
In Google Chrome (Version 148.0.7778.97):
- Select three dots (top-right) and Print... or Ctrl-P
- Choose Destination as Save to PDF
- Click Save and select a filename to save your graphic
- The graphic will be saved to a PDF
The instructions will vary from browser-to-browser