conversion from pdf and import

I have been busy with other things for a couple of years, and have probably forgotten my Musescore skills (which were admittedly never particularly strong).

I am now planning to get back into arranging/composing - mostly small-group jazz, and mostly standards but with extensive arrangements and re-harmonizations.

I read here that Musescore 4.0 will feature extensive re-design of the interface, capabilities and command-set, so before starting again from near the bottom of the learning curve, I will probably wait until the 4.0 release before digging in to re-learn Musescore.

Meanwhile, wondering if anyone can suggest a process for using some 3rd party tool with music - optical character recognition to scan music notation (ideally including chord symbols) to generate MusicXML or MIDI or some other format, which can then imported to Musescore (3.x or 4.0), as a time-saving starting point for further corrections and development of custom lead sheets/arrangements in Musescore.

Thanks to forum experts for any advice or guidance....