Hello @Edwin Lee
Thanks for reaching out to us, this feature is in Azure Machine Learning Studio, you can go ahead to your azure portal, select your Machine Learning resource and open your Azure Machine Learning Studio, then you should see the feature on your left panel as below screenshot -
I hope this helps, more information about this feature you can find in the document - https://learn.microsoft.com/en-us/azure/machine-learning/prompt-flow/overview-what-is-prompt-flow?view=azureml-api-2
Please let me know if you can not find it or you have more questions, we are happy to help.
-Please kindly accept the answer and vote 'Yes' if you feel helpful to support the community and help more people, thanks a lot.