Quote from Kia:
No special break-in period is needed. By following a few simple precautions for the first 1,000 km (600 miles) you may add to the performance, economy and life of your vehicle. Do not race the engine. While driving, keep your engine speed (rpm, or revolutions per minute) between 2,000 rpm and 4,000 rpm
https://www.google.com/search?channel=fs&client=ubuntu&q=kia+running+in+engine+recommendation
The manual specifies the first service is at 15,000 km.
IIRC, I asked for a link first, which has not appeared.