How to configure smart action triggered create screen

Summary:

We are trying to use Smart Action to call for Create Relationship Under the Contact Object. It was able to trigger the create layout. However, the layout is not what we anticipate. How can we customize the create relatinoship page under a smart action? Or to link it to an existing dynamic form in Redwood

Also: I've already read through this article and it does not provide the answer: https://blogs.oracle.com/vbcs/post/traversing-business-objects-relationships
I understand that it will be a native function in 24B, but this is a critical requirement for the busienss, and we are going live in 2 weeks so we cannot wait until the native solution is available.