Hi Paolo,
Welcome to Microsoft Community.
I'm Hahn and I'm here to help you with your concern.
Yes, with the Surface Laptop 7, you can indeed charge using the USB-C port. Additionally, you can use the same USB-C port to connect to an external monitor. This should make things much more convenient compared to the older models that relied on the proprietary Microsoft port.
USB-C and Fast Charging for Surface - Microsoft Support
Set up a Surface USB-C to display adapter - Microsoft Support
I hope this helps. If there is anything not clear, please do not hesitate to let me know.
Your Sincerely
Hahn. W - MSFT | Microsoft Community Support Specialist