No idea why the menu disappeared, but if the functionality is still there, you can run
ContextMenu LABEL="Share"
or
ContextMenu VERB="Windows.ModernShare" LOOKUP
on the files to get the Share dialog.
No idea why the menu disappeared, but if the functionality is still there, you can run
ContextMenu LABEL="Share"
or
ContextMenu VERB="Windows.ModernShare" LOOKUP
on the files to get the Share dialog.