I've filed a bug that manualPrices is unnecessarily confusing. https://developer.apple.com/forums/thread/711223

I contacted App Store Connect support, and they said that they can't offer me technical support for the App Store Connect API. Guess where they sent me? https://developer.apple.com/support/technical/ Right back where I started!

This worked for me.

I believe so, but I don't know how to prove or disprove that I included it correctly. I do know that when I generate a Privacy Report using the Xcode Organizer, it includes privacy settings from FBAudienceNetwork, which, as far as I know, must have come from FBAudienceNetwork's privacy manifest. I'm submitting the exact same build that generated the FBAudienceNetwork Privacy Report to App Store Connect, but, again, I don't know how to prove or disprove that I've done it correctly.