Help setting up multiple monitors

Just bought xreal ONEs and they work on my lg gram with intel iris Xe graphics but I need to set up multiple monitors or they are useless to me. The usb-c ports support monitors - they are usb-c/lightning ports and as I said the Xreal glasses seem to work fine but I need mutiple monitors. I downloaded and installed the latest Nebula but when I open it is says attach your Xreal glasses. Do I need to get from usb-c/lightning or hdmi to usb-c with DP support? If so how do I do that. A search did not turn up any appropriate addapters. Everything is going TO HDMI from DB. Not the other way around. Thanks for any help.