How can I check what the user sees when opening the share link?

You can open the share link in your own browser. When you open the share link, you will temporarily also be granted read-only privileges and you will see the same thing as the person you shared the link with. To exit read-only mode, navigate back to the project list. You can also use another device where you are not yet logged in to the same SurveyTransfer account to check this.