NO! you can't do that. That's exactly why I bought it. After several days of research, we found out that it is impossible to connect 2 monitors with good resolution. It needs a different dock for that. For me, the part is unusable and declared opaque by the manufacturer.

There are several versions of the WD19 Dock:

1.) WD19 USB-C with 130W PSU and 90W output for DELL and non-DELL devices.
2.) WD19 USB-C with 180W PSU and 130W output for DELL devices and 90W for non-DELL devices
3.) WD19TB Thunderbolt 3 with 180W PSU and 130W output for DELL devices and 90W for non-DELL devices
4) WD19DC USB-C which has two USB-C connections, 240W PSU and 210W output for selected DELL devices, max 130W for most DELL devices via single link and 90W for non-DELL devices.

https://www.dellemc.com/resources...
https://www.dellemc.com/resources...

Furthermore, with USB-C 3.1 the bandwidth is limited to 10Gbit, which is why you have to consider which monitors can be connected. For 4k at 60Hz, Thunderbolt or USB-C 3.2 is clearly recommended, as 12.5Gbit bandwidth is required for 4k 60Hz. 4k at 30Hz is possible via USB-C 3.1, as it only requires half of the 6.2Gbit bandwidth.

https://www.dell.com/support...

It does not matter whether it is a Windows computer or a Mac. As described, the WD19 is a USB-C dock, so the data stream is limited and a maximum of two 1920x1200 monitors can be connected. For higher resolutions, Thunderbolt is required, which is the WD19TB at Dell. However, the socket on the laptop must support Thunderbolt (lightning symbol).
This is not Dell specific, it is the same for all manufacturers' products as it is limited by the interface specification, not by the manufacturer of the dock.