Yes, the HDMI port on the USB-C Snap Hub works with an external display on the MacBook Neo at up to 4K at 60Hz, which matches the MacBook Neo display limit. You can use the external display alongside the MacBook Neo built-in screen for a dual display setup.

1. Connect an HDMI cable from the HDMI port on the USB-C Snap Hub to an HDMI equipped display.
2. Use a direct HDMI connection. The HDMI port only supports direct HDMI connections.

The USB-C ports on the USB-C Snap Hub (PD and data) do not support video output.