Apple Intelligence on iPhone 14 why isn’t it there?

Because Apple Intelligence requires a phone with 8GB of RAM, which no phones except iPhone 15 Pro/15 Pro Max and all iPhone 16 models have. Your phone doesn't have the RAM, thus it simply cannot support Apple Intelligence. If you want an iPhone with Apple Intelligence, Apple will take your phone in trade or you can sell it privately and use the trade or sale money towards an iPhone which has the processing power to run Apple Intelligence.

Your phone does everything today, it did when it was new. Apple never suggested older models would get all new features and in fact they specifically suggest not all new features will work on all devices capable of running iOS 18. Expecting a two year old iPhone to be able to run the newest features, when the phone doesn't have the hardware required is just not going to happen.