Some more insights: I deleted all local profiles downloaded the Store-Profiles (appear in ~/Library/MobileDevice/Provisioning Profiles - including the entitlement) Archive --> embedded profile includes the entitlement as well distribute via organiser New Provisioning-Profiles are created (called iOS Team Store Provisioning Profile: XXX) which doesn't include the entitlement

Is there something misconfigured in my project? I basically used the Example from https://developer.apple.com/documentation/networkextension/local_push_connectivity/receiving_voice_and_text_communications_on_a_local_network. We stripped it down for our needs (no server but using a MQTT-Lib in the Extension) - right now it is just a proof of our concept, but I have to publish it to testflight for testing...