I am almost certain that I saw mention, somewhere, of an upcoming change that would allow the initial creation of an entity list through uploading a csv file to Central. If I am right, can someone indicate when this might be possible?
Maybe you saw it on our roadmap at https://getodk.org/roadmap?
Create Entities from uploaded spreadsheets
Allowing users to bulk upload their spreadsheets to make Entity workflows faster and more efficient.
It's being worked on now and we're expecting it to be released in a few months. You can track the progress of the release at https://github.com/orgs/getodk/projects/6.
Great, thanks for the feedback!