How to find out the ID of the created biome?

Hello, I'm creating a large mod for a project and I actually needed to create a biome. Unfortunately, we needed to find out the ID of the biome that I created in MCreator due to the fact that we are creating a custom map in WorldPainter. But the problem remains that in order to add a custom biome to WorldPainter, you need to know its ID, I’ll attach a screenshot below. I hope for your help and thank you in advance.