Core ML - Append Models to existing collection

I have created a collection with 2 models on Core ML Deployment Dashboard under the Apple developer console. Now I want to add more models under the same collection but I don't see this option. How can I do that?

• Video from WWDC: https://developer.apple.com/videos/play/wwdc2020/10152/
• Documentation: https://developer.apple.com/documentation/coreml/creating_and_deploying_a_model_collection