For devices running Android 8.1.0 (Oreo), the Google Play Store typically updates automatically in the background. However, if your store is missing or outdated, you can manually download and install the compatible APK. Direct Download Links
Google Play Store 8.1.72: A standard version often associated with that era. google play store apk for android 810 link
Architecture: Most 8.1.0 devices use arm64-v8a or armeabi-v7a. For devices running Android 8
Installing an APK on Oreo requires a slightly different process than older versions of Android, as "Unknown Sources" is now managed on a per-app basis. Install Playstore on Android 8.1.0 - PINE64 Forum Free up space – at least 50 MB free in internal storage
Downloading Google Play Store APK for Android 8.1.0: A Step-by-Step Guide