Please verify the below link:
In the Sharing Widget Pape Templates section (near the bottom of the article), the first step says:
Go to Control Panel → Sites → Page Templates
This is not accurate. For Liferay DXP 7.1 it should be:
Control Panel > Sites > the selected Site > Pages > Page Templates
Could you please correct this information? Based on my experience everything else is still valid.
Thanks for your help!