When will iphone 14 plus discontinued?

I don't know where you are, but before I posted my response, I went to the US Apple.com and indeed, one can still purchase an iPhone 14 Plus from Apple today. www.apple.com And you click on iPhone. Then iPhone 14, then you can choose either the 14 or 14 Plus.

No one here can answer that question. This is a user to user only forum and no one here works for Apple or has inside knowledge of when Apple will discontinue any products. All we can say is it is currently sold by Apple

Apple doesn't sell the iphone 14 plus anymore which doesn't mean it's discontinued, it'll update to the latest IOS up to 8 to 10 years and hardware up to 5 to 7 years. Macworld 'How long does Apple support iPhones?'

Oh yes you're right! It's only the pro then that are not sold anymore, well at least at the Apple Stores, well good news for the 'discontinued' question then

Indeed! :-)