SPComponentLoader and Component IDs

[MikeH350]

In the react-directory sample web part, the ID of the component for a user's Microsoft Profile Card is:

const LIVE_PERSONA_COMPONENT_ID: string = '914330ee-2df2-4f6e-a858-30c23a812408';

which is used in SPComponentLoader to load the Profile Card:

private async _loadSPComponentById(componentId: string): Promise<any> {
    try {
      const component: any = await SPComponentLoader.loadComponentById(
        componentId
      );
      return component;
    } catch (error) {
      Promise.reject(error);
      Log.error(EXP_SOURCE, error, this.props.context.serviceScope);
    }
  }

Is there a list of component IDs that can be loaded with SPComponentLoader and are the components themselves able to be modified? Or are they canned components?