M5 MacBook Pros have been shipping for over three months now.

The M5 Pro/Max variants aren't; but an M5 Mac is a thing you could have bought for a good while now.

Here’s the correction.

https://www.apple.com/shop/buy-mac/macbook-pro/14-inch-m5

The requested correction was on the "iOS has been locked down on downgrading since forever" part and another reply had already provided one for M5 being sold (though only pros seemingly) :)