Powered By value

Just wondering where the app clip “powered by xxxx” comes from, I’ve changed the bundle display name in both the info plist for the main app and the app clip but that doesn’t seem to change it. The app is on TestFlight but not the App Store yet.
The "Powered by" value is the name of the full app on the App Store. The value will be populated once the app is published.
Thanks, prior to publication, where does the value come from?
Powered By value
 
 
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