I have created a PowerApps form (canvas) embedded in SharePoint and publish that. It is working fine in desktop but when I open the same link in iPhone (safari or chrome). I get this message.
A missing cookie prevented sign in for one of your services. To avoid signing in for each additional service, make sure third-party cookies are allowed in your browser. For Safari, disable "Prevent Cross-Site Tracking" in the "Privacy and Security" section of settings
I don’t want to change settings in iPhone as there are many users and we can’t ask end users to change their iPhone settings for using power app.