Custome Wyvern eggs and Changing spawn point

I have a custom wyvern, and I play on ragnarok. I wanted to find a way to have my wyvern spawn in the desert, with eggs. But I don’t know how to change that or make it so that works. All I can find are how to make other custom dinos locations change spots. And also, how do u get a wyvern to lay eggs so that you can grab and hatch them?

You will probably want to make a map extension for Ragnarok with your custom Wyvern nests.