Wow, now I am really being challenged. Thank you so much for explaining one option. I have sought a means of importing a VST sound into MuseScore 3.62, so that I can use it in the program to adapt a song to sheet music. The .sf2 soundfonts that Musescore 3.62 currently use, are OK for some things but miss some of the more beautiful and powerful instrument sounds that VST provides. That is why I wondered if I could somehow bring VST sounds into the program.

I realize that as you explained, if I want to write an adaptation of a song into sheet music with a particular .sf2 instrument sound, then export it as a MIDI into BIAB, Reaper or some other program to replace the .sf2 sound with a VST sound (after a big learning curve), I suppose I could do so. What happens then? Can I export it as a MIDI file from that other program and re-import it into Musescore with the VST sound intact? I suspect I cannot! If there is no "resident" .sf2 instrument sound in MuseScore 3.62 to use, I doubt if I can bring the sound in, even as a MIDI file. That is why I asked if a VST sound could be re-created as an .sf2 soundfont so I could load it into Musescore. If I am wrong, please advise.

fg