@Jarvis Sun Thanks for posting in our Q&A.
For this issue, we usually install Company Portal for Android from these stores:
Portal AppStore(Opens Meta Portal help documentation)
Google Play
Amazon Appstore for Android
Please refer to the following article:
https://learn.microsoft.com/en-us/mem/intune/user-help/sign-in-to-the-company-portal#android
Hope it will give you some ideas.
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