How to call a form action from another route while propogating data?

[diericx]

I currently have a resource trainingProgram that can have many exerciseEvents.

src/
  exerciseEvent/
    +page.server.ts
    +page.svelte
    form.svelte
  trainingProgram/
    +page.server.ts
    +page.svelte

Exercise events can be viewed and created from the exerciseEvent route as well as from the trainingProgram route.

As of now, the trainingProgram route simply references the form component and the action in the exerciseEvent route.

<ExerciseEventForm
	action="/exerciseEvent?/new"
	redirectTo={`/trainingProgram/${$page.params.id}`}
	...
/>

The action returns the payload from the api for success/failure messages. The issue is that I am forced to redirect back to trainingProgram which drops the data coming back from the api.

Is there any way to reference actions from other routes without losing functionality? I'm sure I can copy the action to each route that wants to use it, but that seems super redundant.