Not true, you will lose some:
https://www.noble.org/news/publications/ag-news-and-views/2009/may/nitrogen-losses-from-urea/#:~:text=If%20you%20till%20in%20the,water%20to%20form%20ammonium%20carbonate.
It's best to spread right before a rain or work out into the ground.
Sorry, just reread...