How to Locate and Interact with Elements Inside Shadow DOM and iframe in Selenium?

I am trying to scrape a website which has Shadow DOM and iframe. As you can see in the image I can't find any selector for the Shadow DOM so I can get to iframe.


HTML elements


How do I locate Shadow DOM (either CSS Selector, XPATH, etc.)?


The page I am trying to scrape is: scrape.do


P.S. I was aiming for the iframe in this way:
iframe = WebDriverWait(driver, 10).until(
EC.presence_of_element_located((By.ID, 'cf-chl-widget-3kwf9'))
)