Just finished installing mojave on xps 15 7590, 9980HK, 32 gb ram, gtx 1650.
I used Luletter efi and kexts for the xps 9570 ( https://github.com/LuletterSoul/Dell-XPS-15-9570-macOS-Mojave/ ), I saw other people here used it successfully, meaning most things working.
I changed the wifi card...