Go to Settings > Apps > Your App > Battery > Optimize Battery Usage and turn off optimization for your app.
Device-Specific Notification Handling: Some Samsung devices (especially recent ones with One UI) impose additional restrictions on background notifications. You might need to guide users to allow the app to run in the background or turn off restrictions. For this:
Go to Settings > Device Care > Battery > App power management and disable "Put unused apps to sleep" for your app.
HUAWEI | In Progress | - | N/A |
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TENCENT | In Progress | - | N/A |
OPPO | Published | 2.3.2 | N/A |
XIAOMI | Published | 2.3.2 | Open Link |
VIVO | In Progress | - | N/A |