the ipa is just a zip that contains Payload/AppName.app
metadata is in Payload/AppName.app/Data/Managed/Metadata/global-metadata.dat
il2cpp is in Payload/AppName.app/Frameworks/UnityFramework.framework/UnityFramework.
GlobalGameManagers is in Payload/AppName.app/Data/globalgamemanagers
it's not relevant if the IPA is encrypted or not since AFAIK only the main binary is encrypted
From discord: