Hi @apurvasharmad and @dcoulombe
Welcome to the Auth0 Community!
Thank you for posting your question. Unfortunately, dynamic dropdown list adjustment is unavailable in the Early Access Forms for Actions feature. However, the team is still developing and improving this feature, and I encourage you to leave the team feedback in the Feedback category. You can read our FAQ regarding submitting a feature request here: How do I submit Product feedback or feature requests?
Thanks
Dawid