Hey there, ansamabi!
Thank you for using Apple Support Communities! From your post, it sounds like you're trying to connect your iPhone 11 to your projector, but the Netflix and Disney+ applications are not working for you.
You may notice this if the apps are incompatible with your adapter. You can reach out to the developer, or check the app's info page in the App Store for compatibility.
If it is compatible, I recommend taking the steps under the section "Get help" in this support article:
About Apple Digital AV Adapters for iPhone, iPad, and iPod touch
For additional help if the issue persists, please Contact Apple Support.
Take care!