normal image, for reference: The atlternative text is speaking!!
iframe elements with svg:
iframe with img role: iframe without specified role: iframe with presentation role:

iframe elements with HTML content:
iframe with img role: iframe without specified role: iframe with presentation role:

img elements with SVG image:
img with img role: The atlternative text is speaking!! img without specified role: The atlternative text is speaking!! img with presentation role:The atlternative text is speaking!!