App not showing up in Google Play Store for Galaxy S8+ (model G955U), what can be the problem?

I have an app in Google Play, which has such configuration:

    minSdkVersion = 21
    compileSdkVersion = 28
    targetSdkVersion = 28
    buildToolsVersion = '28.0.0'
    supportLibVersion = '28.0.0'

One of the potential user which has Galaxy S8+ (model G955U) can't see my app in Google Play. I checked the list of the supported devices in Google Play for my app and I see that other model of Galaxy S8+ is supported, but this particular model (model G955U) is not. User has latest OS on his phone. What can be the problem? What should I do so my app can support this phone model as well?