quarague's answer is exactly correct, I'm just spelling out the math so that it is obvious at a glance:
cases per day:
200 cases per 1 million inhabitants = 200/1000000 = 0.0002
140 cases per 100000 inhabitants, divided by 7 days = (140/100000)/7 = 0.0002
As mentioned in a comment by Mad Scientist:
Ourworldindata reports around 200 cases per 1 million inhabitants per day where this number is the average over the last 7 days. DieZeit reports around 140 cases per 100.000 inhabitants in total over the last 7 days. With rounding these two incidence rates match up exactly.