"Make a Link" Nautilus extension functionality now missing in 21.04?

Solution 1:

As in versions of nautilus prior to 40.2 that comes with Ubuntu 21.10, this is an optional right-click menu item, turned off by default in Ubuntu. Enable it from the Preferences (≡ menu, Preferences).

In Nautilus 3.36, the setting "Show action to create symbolic links" is on the "Behavior" tab under "Link creation":

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In Nautilus 40, the option "Create link" appears under the section "Optional Context Menu Action":

Nautilus Preferences