Can the icon be installed in any of the footer widgets ?

I installed and activated Printfriendly plugin and inserted it in the post-data area below content of each post.

But this does not show up properly on tablets and mobiles.

Can you detail a way to put and activate the code in one of the footer widgets in the responsive theme of my blog ?

This is one of the links of a post of my blog – https://smstoneta.com/prajaadhinbharat/chapter-1/

Will appreciate a quick response.

Thanks.

https://www.ads-software.com/plugins/printfriendly/