Can you share link to product detail page? We can help easier.

Hi,

There are many answers on StackOverflow: 

• https://www.google.com/search?q=back+to+top+stackoverflow&rlz=1C5CHFA_enRO939RO939&oq=back+to+top+stackoverflow&aqs=chrome..69i57j33i22i29i30l9.5380j0j7&sourceid=chrome&ie=UTF-8
• https://stackoverflow.com/questions/55399726/how-to-create-a-button-to-go-back-to-the-top-of-the-page

You only need to add it only on product detail pages.

<p><a href="#" class="btt"> Back to Shop </a></p>  

Stick the above code in a code block anywhere you want. Delete the default text in the blog before you paste the above code. The code takes you back to the top of the page. You can change the text to "Back to Menu", whatever you want.