Apple has apparently delisted the LG UltraFine 5K Display from its online retail store. This could possibly mark the end of the product and might be a harbinger of Apple selling its own professional-grade monitor. Rumors are flying that Apple will soon release a 31.6-inch 6K display for use with the Mac Pro desktop.
https://www.notebookcheck.net/UltraFine-to-Ultra-rare-Apple-seemingly-removes-LG-UltraFine-5K-display-from-its-store.420397.0.html