if someone should have the problem, here is the solution:
Use Execute Javascript on Element:
let element = document.querySelector(':nth-child(2) > :nth-child(2) > :nth-child(1) > :nth-child(1) > :nth-child(1) > :nth-child(1) > :nth-child(2) > :nth-child(1) > div > input'); [[Variable]] = element.checked;it then returns true or false.