It is possible that it is AS only. It may use the machine learning components of AS.
Edit:
As of July of 2021, Live Text was available in beta on Intel Macs so by the time Monterey shipped it worked on both Intel and AS.
Whether it works on a given document may depend on how that app displays the image. I can see where it would be complicated in a PDF where you may have combinations of text, images, and OCR’d text behind images.
Edit: As of July of 2021, Live Text was available in beta on Intel Macs so by the time Monterey shipped it worked on both Intel and AS.
Whether it works on a given document may depend on how that app displays the image. I can see where it would be complicated in a PDF where you may have combinations of text, images, and OCR’d text behind images.