Usually it is necessary to make changes like renaming, adding, removing parts, changing their materials and colors, these are all basic functionalities that Unity already provides.
It is important to note that when done making changes in the digital twin,
You must use the 'Setup' function before play testing or building the digital twin.
The Setup function defines the current state of the model as a default state.
*This action can be done only in Unity's Edit mode.
The way to setup is by clicking on the top object of the model's hierarchy, which contains the component called 'Zero State Manager'. if you can't find it, use the search field in the hierarchy, and write ZeroStateManager.
Then press on the Setup button.
Test the changes in the model in Play mode.