[NAME]  Did you perhaps check the User Guide of the dock as part of your search for solutions?  The reason it won't work is because your setup doesn't allow enough video bandwidth for 4K 60 Hz.  As noted in the User Guide for that dock, 4K 60 Hz is only possible when the source system supports DisplayPort HBR3 over USB-C.  Your system only supports DisplayPort HBR2, and the Display Resolution Table in the User Guide indicates that with that type of system, you can run only 1440p 60 Hz or 4K 30 Hz.  The first XPS 15 to support DisplayPort HBR3 is the current 9510, which is two generations newer than your 7590.  If you want 4K 60 Hz through a dock with your system, you'd need the WD19TBS, which uses Thunderbolt 3 rather than USB-C and as a result can tap into 4x more video bandwidth than the WD19S with your system.  With that dock you'd be able to run dual 4K 60 Hz, as long as you cabled the displays properly.  That's covered in the User Guide of that dock model.
Hello everyone I have an XPS 7590 computerI bought today a WD19S 180W docking stationI have an LG oled c1 4k external screenI can not set it above 30 HzI saw here in the forum all kinds of solutions that did not work for meWhat is your solution?
Unable to set 60 Hz on a xps 7590 computer with 180W WD19S