For scanned documents: PyMuPDFPro

What all OCRs are supported in PyMuPDF Pro?

Hi @Krati_Gupta - welcome to the forum!

Currently PyMuPDF supports the Tesseract OCR, however I believe additional OCR engines will be available in the future (kind of like plugins).
See: https://pymupdf.readthedocs.io/en/latest/pymupdf-layout/index.html#ocr-support & Installation - PyMuPDF documentation for more.