{
  "expo": {
    "name": "expo-login",
    "slug": "expo-login",
    "privacy": "public",
    "sdkVersion": "31.0.0",
    "platforms": [
      "ios",
      "android"
    ],
    "version": "1.0.0",
    "orientation": "portrait",
    "icon": "./assets/icon.png",
    "splash": {
      "image": "./assets/splash.png",
      "resizeMode": "contain",
      "backgroundColor": "#ffffff"
    },
    "updates": {
      "fallbackToCacheTimeout": 0
    },
    "assetBundlePatterns": [
      "**/*"
    ],
    "ios": {
      "supportsTablet": true
    }
  }
}

　　　↓

{
  "expo": {
    "name": "expo-login",
    "slug": "expo-login",
    "privacy": "public",　 // public
    "sdkVersion": "31.0.0",
    "platforms": [
      "ios",
      "android"
    ],
    "version": "1.0.0",
    "orientation": "portrait",
    "icon": "./assets/icon.png",
    "splash": {
      "image": "./assets/splash.png",
      "resizeMode": "contain",
      "backgroundColor": "#ffffff"
    },
    "updates": {
      "fallbackToCacheTimeout": 0
    },
    "assetBundlePatterns": [
      "**/*"
    ],
    "ios": {
      "supportsTablet": true
    },
    "android": {　// 追加
      "package": "com.nekotype.expo-meomry2"　// 追加
    }　// 追加
  }
}

expo login
There is a new version of expo-cli available (2.10.1).
You are currently using expo-cli 2.7.1
Run `npm install -g expo-cli` to get the latest version
? You are already logged in as tama. Log in as new user? (Y/n)

> expo-cli build:android
There is a new version of expo-cli available (2.10.1).
You are currently using expo-cli 2.7.1
Run `npm install -g expo-cli` to get the latest version
[02:01:17] An Expo user account is required to proceed.
? How would you like to authenticate? (Use arrow keys)
> Make a new Expo account
  Log in with an existing Expo account
  Cancel

[06:47:12] You can monitor the build at

 https://expo.io/builds/313917c5-ec9a-46a0-b0ab-66feaaxxxxx  //←WebのEXPOで経過がみれる


|[06:47:12] Waiting for build to complete. You can press Ctrl+C to exit.
[06:57:19] Successfully built standalone app: https://expo.io/artifacts/78e1c7a3-bf99-4cbc-96c4-9dxxx　//apkがダウンロードできる

その後、WebのEXPOから過去のbuildなどのダウンロードができる。

Expoログイン

• Field: android.package - 'android.package' should be a reverse DNS notation unique name for your app. For example, host.exp.exponent, where exp.host is our domain and Expo is our app. The name may only contain lowercase and uppercase letters (a-z, A-Z), numbers (0-9) and underscores (_). Each component of the name should start with a lowercase letter..
[02:21:36] Couldn't publish because errors were found. (See logs above.) Please fix the errors and try again.

　　　↓

"com.nekotype.expo-meomry2"
　　を
"com.nekotype.expo.meomry2"
　　に変更したら消えた

同じアプリ(app.jsonで名前は変えてい)がインストールされているからだった。
削除したらインストールできた。