iPad will not find the core

[xxx (Banned - toxicity)]

iPad Mystery Is Driving Me Nuts

@Asiong_Jie, iPadOS14.2 introduced more security features, and apps have to be specifically authorised to access the LAN. Go into the iPad’s setting and adjust them to grant access. Alternatively, uninstall the Roon iPad app. reboot the iPad and then reinstall Roon … on reinstallation the iPad will prompt to allow access for Roon.