Apple's aggressive approach to preventing cross-site tracking on websites means that a proportion of your users will be blocked from accessing your courses when they are shared via SCORM from your LMS. To prevent this from occurring, you will need to ask your users to disable cross-site tracking prevention before they access your course.
Even if you're not using Safari on your iOS device, you will still need to follow the steps below for iPhone and iPad.
How to disable cross-site tracking prevention for iPhone
Go to Settings > Apps > Safari
Then below Privacy & Security
Disable the option Prevent Cross-Site Tracking
How to disable cross-site tracking prevention for iPad
Go to Settings > Safari
Then below Privacy & Security
Disable the option Prevent Cross-Site Tracking
How to disable cross-site tracking prevention for Mac OS
In the Safari app on your Mac:
Choose Safari > Settings
Then click Privacy
Uncheck the Prevent cross-site tracking option