コミュニティノートにリンクされてるアッポーの方でblockが含まれてる文章読んでみたんですが、該当しそうなのは２つ。

The ability to block abusive users from the service

と

5.4 VPN Apps

Apps offering VPN services must utilize the NEVPNManager API and may only be offered by developers enrolled as an organization. You must make a clear declaration of what user data will be collected and how it will be used on an app screen prior to any user action to purchase or otherwise use the service. Apps offering VPN services may not sell, use, or disclose to third parties any data for any purpose, and must commit to this in their privacy policy. VPN apps must not violate local laws, and if you choose to make your VPN app available in a territory that requires a VPN license, you must provide your license information in the App Review Notes field. Parental control, content blocking, and security apps, among others, from approved providers may also use the NEVPNManager API. Apps that do not comply with this guideline will be removed from the App Store and you may be removed from the Apple Developer Program.

blockの定義説明がない(どっかにはあるのかも?)からそれっぽい機能(ミュート)が有れば見逃されそうな気もしますが、通報があったら消されても不思議ではなさそうっすねー．知らんけど．

あくまで素人の解釈です。