Is there a way to load a union's child and mesh data?

I am currently handling rbxm file data, parsing them and loading them in game. However, upon looking at unions, they were not able to load as they have a special property called “child data” and “mesh data”. I was wondering if there is a way to load them into unions?

For more context, here is the child data from the json parsed union.

You’re currently saving it as a compiled roblox file. That wont give you the information that you would want. You need to save it as a .rbxmx

Edit: Nvm misunderstood the question. Though I wont delete my reply as this may be of use later.