The iPhone was unveiled in 2007. Even if the designs had leaked before then, it would take many months to develop and market an imitation.
So? The F700 was released in December 2007, "many months" later...
The whole point of the evidence they presented is to demonstrate that Samsung and others had for years been working on and marketing remarkably similar devices with large touchscreens.
That's not being disputed. Apple claims that those designs would have never been successful in the market without the iPhone to copy from because there were a lot of challenges to overcome in order to make them work. Apple even used the Prada, a phone that came out before the iPhone and failed horribly, to demonstrate this. While designing a phone with a touchscreen is trivial, designing a phone with a touchscreen that behaves correctly is not. It was not until the iPhone that everybody finally understood how to properly design touchscreen phones and implement touch-friendly firmwares that don't require stylii for anything.
The Apple narrative is of course that they brought out the iPhone and everybody else copied them with even the devices that came out before the iPhone retroactively became copies (or, as with the F700, quietly dropping it from their accusation when they realized their folly).
They might have dropped it because of the builtin keyboard making it sufficiently different.
I think it's sad to not actually understand what the issue is.
Back in 2006 this was considered natural design evolution.
Absolutely, but would it have been successful design without Apple setting an example? I guess not. There's a long way between wishful thinking like drawing a few drafts based on an untested concept and actually building a product that works while betting the company in the process.