It wasn’t that long ago that objects like input_booleans required an HA restart anytime you added/modified them. Now you can reload most of them within the config menu. Are there any objects that you still must restart HA in order to load changes made in their underlying YAML?
I think the easiest answer to that is to look in the services tab of dev tools. Anything that doesn’t have a “xx.reload” service needs a restart to reload.