This documentation covers PyMuPDF |version|.
The major and minor versions of PyMuPDF and MuPDF will always be the same. Only the third qualifier (patch level) may deviate from that of MuPDF.
Typically PyMuPDF is released more frequently than MuPDF so it will often be the case that the patch level of PyMuPDF will be greater than the embedded MuPDF.
For example PyMuPDF-1.24.5 contains MuPDF-1.24.2.
Also see pymupdf_version and mupdf_version.