Atlassian writes that sprints get migrated using the Jira Cloud Migratio Assistant https://support.atlassian.com/migration/docs/what-gets-migrated-with-the-jira-cloud-migration-assistant/ but mine don't.
The post-migration log shows no sign of sprints either:
|Type,Project,Number in migration,Successfully migrated,Partial data loss,Not migrated|
|Advanced Roadmaps plans,,0,0,-,0|
Has anyone else experienced that too, or know a solution?