The original "phablet" was the Samsung Galaxy Note, considered comically large. At 147mm x 83mm, it's about the same size as the iPhone 18 Pro (150mm x 72mm)
But, and this is probably what you meant, the iPhone 17 has a bigger screen. That's because recent phones got rid of the bezels, so they can fit more screen in the same body. That's why they have taller aspect ratios.
Uh, yes? The first widespread usage of the word "phablet" I can recall was regarding the HTC HD2, which had a whopping 4.3" display and some people were losing their minds saying nobody would want to carry that in their pockets.