There are several widget visibility plugins, like this: https://projectdmc.org/plugins/widget-options/
But for a single link, this would be like killing a wasp with a machine gun.
I would use a single line of custom CSS code to make the link visible on the homepage only. (If you want this code, you need to mention the specific widget.)
@moviedebuts Please mention screenshot of that exact widget that you want only in homepage?
Thanks, but my problem is solved. I used Widget Options and limited the widget’s display to the home page.