Expo is not Building Android Apk app

Are the following all default images or did you replace any of them with your own images?

  "icon": "./assets/icon.png",
  "image": "./assets/splash.png",
  "foregroundImage": "./assets/adaptive-icon.png",
    "favicon": "./assets/favicon.png"

Also are there any other .png files in your app’s directory or subdirectories?

Does anything change if you change the assetBundlePatterns to the following?

"assetBundlePatterns": [
  "assets/**/*"
],

Also, if you’re on Linux or Mac, maybe try running something like the following and checking if any of the files are not detected as PNG files:

$ find . -type f -name '*.png' -print0 | xargs -0 file
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