You can do or load the template asset like you do with any other asset.
No, the assets aren’t connected. This also means that when you need to use the template asset, you should also load the other asset needed by the template too. Or rely on the engine doing the load when you instantiate it into the scene and each component will trigger a load on referenced assets.
Is there an easy way to see which objects are loading in the hierarchy at runtime. Im sure I saw something once that could show this. Without it it almost impossible to debug exactly what is and isnt loaded.
Template assets are effectively a mini scene hierarchy. You can choose to have them preloaded or not. If they are not preloaded, you have to load them via code like you do with any other asset before using it.
The assets referenced in the template are separate and you can load them whenever you like (preload, via code etc).
The assets referenced in the template aren’t ‘connected’ to the template asset. Loading the template asset will not load any assets it references. And inversely, unloading the template asset will not unload the assets used by the template.
Separate from that, when referenced assets is used in the scene (eg a render asset by a render component) but the asset is not loaded, On the first time it is attempted to be used, it will trigger a load of the asset and won’t render until the asset is loaded.
This means that if you instantiate a template into the scene and the assets it uses aren’t loaded yet, it will attempt to load them and they will render in the scene as each asset is loaded.