Uber lost out on Grubhub. That's bad news for Uber Eats.

For the past few weeks, rumors were flying that Uber Eats was combining forces with Grubhub. Then a European delivery app swooped in and shook everything up.

Just Eat Takeaway, a Dutch company dominant in the European market, acquired Grubhub for $7.3 billion, providing some serious competition for Uber Eats and DoorDash. The...