I thought this looked great until I tried it. I put in a dummy trip to Norway and it told me:-

“Fully vaccinated travelers are allowed to enter Norway. Norway only accepts vaccination certificates issued in specific countries. Please check the documentation, quarantine and/or testing requirements before traveling.”

This means I have to go to the Norwegian government website to see which vaccination certificates they accept. All of the info on entering Norway is there so using Sherpa saved me no time whatsoever.