The + sign inside circle, + icon,

The (+ sign inside circle), + icon, on the frame is not showing so I can connect two frames, and do wireframing. i made web pages, now i want that when i click on one page it will bring me to the other page so my work will done. but Figma is not showing me the + icon so then i can connect two pages with the line the connector.

I open and try both web version and desktop version on of Figma both are not showing + sign icon

I am using windows 10 Pro.
I am using laptop, Dell latitude E6430

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