Hi @vignesh.jeyaraman ,
Thank you for posting this query on Auth0 Community!
I did some research around this topic. In the current design, the feature of supporting organization prompt for Classic Universal Login is not available. I suggest you communicate directly to our product team using our feedback page and click on the Vote button.
On the other hand, the New Universal Login supports customization if it could fit in your use case. This doc has the details. Hope this helps!