Can it connect an extra monitor when used on a desktop with a discrete GPU?

Yes, the Wavlink USB 3.0 Universal Laptop Docking Station can connect an extra monitor when used on a desktop with a discrete GPU. It supports dual video outputs (HDMI & DVI) through a single USB 3.0 connection.

Questions & Answers: Wavlink USB 3.0 Universal Laptop Docking Station, 13-in-1 USB Hub Dual Monitor Dual Video, HDMI and DVI/VGA/HDMI, 6 USB Ports, Gigabit Ethernet, Audio, Mic for Mac, Windows, Thunderbolt 3 & 4, USB4

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Wavlink USB 3.0 Universal Laptop Docking Station, 13-in-1 USB Hub Dual Monitor Dual Video, HDMI and DVI/VGA/HDMI, 6 USB Ports, Gigabit Ethernet, Audio, Mic for Mac, Windows, Thunderbolt 3 & 4, USB4

Fully Connected: A single USB 3.0 connection from a host PC to this dock provides dual video outputs(HDMI & DVI), wired Gigabit Ethernet, 3.5mm headphone and microphone jacks, 2 x USB 3.0 ports, 4 x USB 2.0
Attention: This dock DOES NOT support charging the host PC
Dual HD Monitors: Expands dual monitors with our USB C dock. 4K HDMI port supports resolutions up to 3840x2160@30Hz with one HDMI display attached. VGA port supports display resolutions up to 1920x1080@60Hz. Includes DVI to VGA adapter and DVI to HDMI adapter.
Fast Data Speed: Docking station equipped with 2xUSB 3.0 ports (up to 5Gb/s) to connect smartphones, tablet, hard drives for effortless data transfer. 4xUSB 2.0 ports, up to 480Mb/s which allow you to connect keyboard or mouse without any lags. Wired Ethernet supports Gigabit speed.
Compatibility: Perfect for laptops with USB 3.0 full-function type c port or thunderbolt 3/4 port. Support Windows 11/10/8/7, Mac OS 10.10-13.x or later, Chrome OS, Android and Harmony OS

$69^.99 –