MiPhone 6s and iPhone 6s Plus

We have already told you multiple times that it is not possible to update an iPhone 6 to anything higher than iOS 12.5.7.

Asking the same question over and over will not result in a different answer. Your iPhone 6 cannot download the apps that you want. End of story.

An iPhone 7 can update to iOS 15.7.7

An iPhone 8 can update to iOS 16.5.1

I want to update iPhone 6 to 14 or 13, please

iPhone 6 and iPhone 6 Plus can only go as far as iOS 12.5.7

An iPhone 6s and iPhone 6s Plus can go as far as iOS 15.7.7

Sorry but as Bob Timmons said, you cannot do that. Your iPhone is not capable.

I want to update iPhone 6 to 14 or 13, please

The iPhone 6 is not qualified for anything more than iOS 12.5.7

If you want to download those apps, then you need to buy a new iPhone.