Hi @Fratz, welcome to our community!
Your post has been translated to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.
The Xperia XZ2-series does not support MHL/HDMI so you can't use an adapter to connect it to a projector. The option you have to share the screen is either using Miracast if the output device supports this, or cast the content via a Chromecast (external or inbuilt).
I hope that answers your question!
