Dear @ANSELMO DEL ANGEL,
Thank you for reaching out regarding the missing My Templates option in Outlook. Based on my research, your situation appears to be similar to an issue that some other users have recently reported. Microsoft is currently investigating this behavior in certain environments.
For reference, please review the answer and link provided by Q&A Assist above. At this time, there is unfortunately no client‑side workaround to manually re‑enable the feature while the incident is active. Once Microsoft’s fix has finished deploying, the add‑in should automatically reappear without requiring any changes on your device.
For issues of this nature, I recommend that the Global Administrator in your organization create a service request with Microsoft Support to help prioritize a fix for your tenant. For detailed instructions, please see: Get support - Microsoft 365 admin. If you don't know who your IT administrator is, please refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support
If Microsoft releases a confirmed fix or update, I’ll be happy to share it here. Please let me know if you need anything else. Thank you for your patience and understanding, and I wish you a wonderful day ahead.