daisy chaining 2 LG Ultrafine monitors
there doesn't seem to be recent updated answers to this question, so I can confirm that you can daisy chain a 5K to a 4K, using the 4K's 2 Thunderbolt 3 USBC ports. Plug the 5K into one of the ports on the 4K, and plug your MacBook Pro into the other. You then have both monitors running full res with only one cable into the MacBook Pro, while also providing power. I also have other cables and a dock plugged into the other USBC data ports on the monitor, so absolutely everything on the desk is connected with only one cable into the MacBook Pro.