Hi @Anonymous ,
Octopus deploy is more cd tool, when Azure DevOps provides end-to-end toolset for the whole ci/cd, including build/testing/deployment.
So, the short answer for your question will be: there is no simple way, how you can just export octopus project and import it as Azure DevOps pipeline. You have 2 ways on how to proceed: try to implement in ADO totally the same flow that you had on octopus or optimize your flow using all features that ADO provides. Personally, I support the second approach.
If you will have some more specific questions regarding such migration, please let me know and I'll try to support.
Best regards,
Serhii