_sarah to see individual responses people would need to have the Share to Collaborate link, or at the very least the summary link although that won't show individual responses. I don't know how you are getting the link to the completed form as the way you've got it, from the link in the email they will only see the blank form. Apart from the Share to Collaborate link, if you wanted to see individual responses you'd need to save the response to a SharePoint list with a flow in Power Automate.
Rob
Los Gallardos
Microsoft Power Automate Community Super User