JSFiddle - React, Tailwind, and code Playground

JavaScript

var dict = {
         'column1': [1, 2, 3],
         'column2': [4, 5, 6],
         'column3': [7, 8, 9]
        };
var transposed_array =[];
for (key in dict){
    transposed_array.push(dict[key]);
    
}
console.log(transposed_array);