Google spreadsheet function to 'explode' a range based on a column that has a 'count' in it. Each row is duplicated 'count' times.

create-cases.js

function CREATE_CASES(input_range, count_column) {
  return input_range.map((row) => {
     let rows = [];
     for(let i=0; i<row[count_column]; i++){
       rows.push(row);
     }
     return rows
  }).flat();  
}