Unable to update my iPhone

Hello everyone! I’ve been iPhone user since iPhone 4s was released and the following has never ever happened to me.

I just got my new iPhone 12 mini and when I go to the software update tab on settings, it doesn’t show me the latest iOS 14.6 version. It keeps telling me that my iPhone is updated.

Now, the deal is that I can’t load my iCloud backup as usual. Can anybody tell me what can I do? HEEEELP!!