Hi Fernando Gois,
Thank you for reaching out to us on the Microsoft Q&A forum.
With the recent update to Power Automate, subflow names can now include spaces. This change is highlighted in the knowledge check, as illustrated in the screenshots below.
We’ve also contacted the content author regarding this change, and they’ve confirmed that the module will be updated accordingly in the coming days.
If the information is helpful, please Accept Answer & Upvote so that it would be helpful to other community members.