Unable to download Google Play Store on my iPhone 16 Plus or my iPad 8th gen

It appears from the title of the post and the contents that the user is specifically asking about downloading the Google Play Store on an Apple device, and the correct answer is that it is not possible. Even in the EU where side loading is possible on Apple devices and you are not required to use the App Store, it still is not possible to use the Google Play Store. It is also true that an Android phone cannot download the App Store, the stores and their apps are simply not compatible.

Google Playstore is only for Android devices.

As no Apple device runs Android, you will never get it.

Just as you cannot download the App Store on an Android device, you cannot download the Google Play Store on an iPhone. You are free to look for any app you wish in the App Store. The developer of an app decides where they want to make their app available and for what device.

It looks like you're asking about downloading apps outside the official Apple App Store on an iPhone. Just a friendly heads-up that installing apps from sources like APKHura isn't possible on iOS. Apple has a pretty locked-down system for security reasons, and you can only get apps through their official App Store. You might find some similar apps there if you search!

Try using the App Store