I need your help with PowerApps. I’ve created some PowerApps for use with SharePoint. I want to prevent students from registering for a course if they haven’t completed the prerequisite. For example, if a student wants to take 'AMERICAN SIGN LANGUAGE 2' but hasn’t completed 'AMERICAN SIGN LANGUAGE 1,' they should be prevented from registering for 'AMERICAN SIGN LANGUAGE 2' by disabling the registration button. Once they complete 'AMERICAN SIGN LANGUAGE 1,' the button should be enabled, allowing them to register for 'AMERICAN SIGN LANGUAGE 2.'
Additionally, if a student has already completed a course, that course should be hidden or disabled to prevent them from registering for it again.