New lawn in Scotland

Hi guys as the title says I have a new lawn recently laid. I’m soaking it 2/3 hours a day with a sprinkler. It has been walked on previously to water before I purchased a sprinkler so I feel like the grass is slightly uneven even though it may not look it in the picture. What is the last remedy for this to make it as flat as possible? I’m planning to leave it as is until its first cut and then I can do what needs to be done to make it perfect 👌🏼