Yes. You can migrate your existing Projects (classic) to the new GitHub Projects through a new feature preview.
How it works:
We’ll create a new project and copy all of the data from your existing project (classic) board to the new one.
Once the data is copied, you can use the new project with all the new capabilities.
Once the new project is ready, we will prompt you to close your “old” project, as the old project is not kept in sync.