Mac Mail - no share option in dropdowns
I just read that I can right-click a Mac Mail message in mail and use "Share" to add a message to Reminders. When I went to try it there is no Share option in any right-click menus, nor indeed anywhere in any of the Mac Mail menu-bar dropdowns - not even greyed out.
Share is available in other apps - Firefox, Safari, Preview, for example - but not in Mac Mail. Mac Mail is the default mailer.
Any ideas for getting Share back on the Mail right-click menu?
Big Sur 11.6.1
Mail 14.0
Thanks in advance.
MacBook Air 13″, macOS 11.6