Redwood Experience / Clarification on Migration process

Summary:

I would like to understand the situation a target env needs to be before migrating redwood pages from the dev enviroments to other NON PROD and finally prod envs.

Specifically

do we need to turn on in each individual environment redoowd? Do we need to set up the global configuration we went thru in the dev env in all the other environments, or the set up carries automagically into each target env?

When publishing a page - does the page need to be redwood enabled in the target env first?

does the person migrating the project from dev need to have the application developer or application admi role in the target env?