Sources: Huawei is considering taking a cut of in-app purchases on its Harmony OS, and has discussed a ~20% fee with developers, below Apple and Google's 30% (Pei Li/Bloomberg)

https://www.bloomberg.com/news/articles/2024-06-18/huawei-considers-app-store-fees-as-it-surpasses-iphone-in-china
http://www.techmeme.com/240618/p10#a240618p10