You would likely save time by creating the Harp indications as Playing Techniques and assigning them from there. The initial effort would save time recreating them later.
You absolutely can – it’s just that the characters in the font are mapped a different way. Check out the SMuFL specification here and search around for other threads explaining the issue.
Thanks for the replies. The Smufl documentation looks just like the unicode symbols, which doesn’t really help since only certain symbols have an alt number you can type directly (i.e., none of the musical symbols).
Should I make the “playing techniques” as individual naturals, sharps and flats for every note letter, so 7x3=21 techniques?