On kagi.com in Safari for Mac, when I go to Settings>Search>Lenses, scroll to the bottom of the page, and toggle an inactive lens under "Other Lenses" to the "on" position, the lens appears to be activated and is moved to "Active Lenses". However, when I X out of the settings and run a search, the new lens does not appear in the dropdown under the search box as expected.
I expect any lens I activate to be available in the dropdown when I perform a search after toggling the lens to "on".