He's 6ft 2in, that hasn't been the midpoint height wise for strikers since the mid 2000s
It might well not be the midpoint but I just don't think of Darwin as particularly tall, nor do I think it's as outdated as you suggest.
Haaland, Weghorst, Isak, Mitrovic, Edouard, Havertz, Wood, Ferguson, Wellbeck, Solanke, Calvert Lewin, Kane, Onuachu, Gakpo, Jimenez all seem taller or about the same height. There are likely more (and no doubt plenty who are shorter of course)
He's about the height of Torres, who I never thought as a particularly tall striker. It's all relative though and probably not that important
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Anyway, it's the Gakpo thread and he is tall. The question I quoted about whether or not we are seeking out taller forwards deliberately is a valid/interesting one (and one I don't really know the answer to).