Static seed (daily challenges)
It's possible to set a static RNG seed instead of having a random one, so that you can have consistent output. This can be used to create things such as daily challenges to make sure all players are presented with the same random map.
Set seed in the inspector
You can simply uncheck the Use Random Seed option from the Map Graph Runner component and provide a static seed in the editor.
Set seed in the SetStaticSeed method
You can also set the seed by calling the SetStaticSeed method on the Map Graph Runner component, which you can either call from other components, using UnityEvents for example, or from scripts.