Alternative path for some devices: Settings → Biometrics and Security → Install unknown apps (though this is more common on Android 8+; on 6.0.1, the global toggle is the standard).
Apps like "Play Store Updater" exist but are not recommended because they often contain ads or malware. Stick to manual updates. download play store apk for android 6.0.1
If your Android 6.0.1 device is missing the Play Store or it keeps crashing, you can manually download and install the latest compatible Play Store APK. Follow this guide. Alternative path for some devices: Settings → Biometrics