@Motta Welcome the Atlassian community
There currently is not a great way to do it but it can be done. Here are the directions on what steps need to be taken. https://support.atlassian.com/jira-software-cloud/docs/migrate-between-team-managed-and-company-managed-projects/
Hello @Motta ! Welcome to the Atlassian Community!
As of now, the only way to change a Team-Managed project to a Company-Managed project is to create the new Company-managed project and move the issues from the original project to the new project by performing a Bulk Edit.
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