I may have misunderstood, but the article stated the following:

‘The two arms of the study were eating between 8am and 8pm, and the eTRF strategy of eating between 8am and 2pm, but remember, both groups ate three meals per day of the same foods.’

So it's not like the time restricted people took in less calories. Both groups consumed the same total amount of calories.

Please correct me if I'm wrong.