Sir please send iPhone 6plus new update

iOS 12 is the newest release that your 7 year old iPhone can install. If you want apps or features that require a newer iOS, then you need to purchase a newer iPhone.

The confusion may be because iPhone 6S and not iPhone 6 is going to receive latest update. Your iPhone model has run out of additional software update!

see: https://support.apple.com/guide/iphone/supported-models-iphe3fa5df43/ios