Hello @Gustavo Calvino Torres ,
this seems to be an IoT Hub portal 'glitch' seen occasionally.
I expect new devices to be added but the list is just not loading.
I have seen it fixed within hours but meanwhile. please check if you can list the devices using the CLI or VS Code Extension for IoT Hub
Is it fixed for your IoT Hub?
Finally, notify the portal team by sending a frown within the portal:
If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. All community members with similar issues will benefit by doing so. Your contribution is highly appreciated.