Converting a PDF to an MSCZ file is less "convert" and more "transcribe." The technology has improved dramatically in the last two years (thanks to AI), but you still need to proofread the result.
, a specialized technology that interprets musical symbols such as staves, notes, and dynamics rather than just text. Primary Conversion Methods
As of MuseScore 4.x, the software includes an experimental PDF to MusicXML converter. It is not perfect (MuseScore themselves call it "experimental"), but it is the most direct route.
This is the most direct way to get a file into MuseScore format.
Appendix: Quick reference decision tree