Contrary to a recent report by Bloomberg, ProtonMail will not be preloaded on future Huawei smartphones. Instead, the Swiss company is considering bringing its email client to Android app stores other than the Google Play Store, including the Samsung Galaxy Store, Amazon App store and the Huawei AppGallery.
https://www.notebookcheck.net/ProtonMail-is-not-becoming-Huawei-s-new-email-client.434641.0.html