This…pattern, the Icon Coat by See Kate Sew, is a crime against sewing humanity, but more importantly, its obvious original inspiration.
And then to rub more salt in the wound, there’s a child-sized version of the pattern, dubbed the Kennedy Coat (just in case you weren’t clear on the inspo).
There’s also another less wtf-inducing indie iteration, the Jackie Coat by Iconic Patterns, spotted by feverish.
Fortunately, Nurse Ratchet suggested Butterick 6141 (sorry, adult-sized alternatives only) as a better-conceived pattern to get the look.
And the original inspiration for juxtaposition: