Dong an OCR for a scanned text with the Mac

Hi again,
a friend of mine told me that with the Sonoma upcoming, Apple created on the Mac the possibility to convert a document taken with the scanner (so a pdf txt as image) in an editable document, and so, a document that we can copy in TextEdit or Pages as a text. For doing it, he told me that we should open the pdf (as previous view), and afterwards press together comand, option, Shift and S (theoretically he told me that it would be "Save as")and it appears a menu, and there we have to choose something like "to incruste text", sorry, I don't know how the Mac says that in english, in Spanish is "encrustar texto", after that, the Mac recognize the text and we can copy it wherever. However, I tried it and when I press command, optin, Shift S, doesn't happy anything, and hi didn't say Save As, and I cannot chose the option "cincruster text" or something like that.
I tried another thing: I went to VoiceOver utilities I activated text recognizing,, I oppened a pdf taken with the scanner, and I pressed VO Shift L, then, the Mac recognizes the text, he reads it, but I cannot copy and paste it wherever.
Please, does someone know this function, and can tell me how it works?.
If we could convert pdf files (taken with the scanner, not textual pdf files) in an editable text, directly with the Mac, it could be really great.
Many thanks in advance.
María