Can we try the Redwood migration accelerator in an Oracle CX lab for training purposes?

Yes. This feature is available inside Application Composer from Update 25C. It's available in Update 25B via an opt-in Cumulative Weekly Bundle (CWB). See these resources for more information:

• Redwood FOBO (front-office back-office integration)
• Where can I get an overview of Orchestration for Oracle Sales in the Redwood User Experience?