Использование цикла For для достижения, я добавил переменную $ {num} внутри nth-child
:FOR ${num} IN RANGE 0 5
\ Log div.col:nth-child(${num}) > div:nth-child(1) > div:nth-child(3) > div:nth-child(1) > combo-box:nth-child(1) > div:nth-child(1) > div:nth-child(2) > div
вы получите вот так
div.col:nth-child(1) > div:nth-child(1) > div:nth-child(3) > div:nth-child(1) > combo-box:nth-child(1) > div:nth-child(1) > div:nth-child(2) > div
div.col:nth-child(2) > div:nth-child(1) > div:nth-child(3) > div:nth-child(1) > combo-box:nth-child(1) > div:nth-child(1) > div:nth-child(2) > div
div.col:nth-child(3) > div:nth-child(1) > div:nth-child(3) > div:nth-child(1) > combo-box:nth-child(1) > div:nth-child(1) > div:nth-child(2) > div
div.col:nth-child(4) > div:nth-child(1) > div:nth-child(3) > div:nth-child(1) > combo-box:nth-child(1) > div:nth-child(1) > div:nth-child(2) > div