add button to full view on product page to take customer back to the full menu

Site URL: https://www.oikos.co.nz/

Is there any way to add a button to the full view on product page on mobile to take customer back to the main menu? Similar to how it does on desktop, where there is the button directing back to "View Full Menu".

You mean: add button to this page, under Hit & Run button? https://www.oikos.co.nz/desserts/loukoumades-23569

If yes, I think it needs some JavaScript, seems a bit complicated