This tutorial is how to use nodes to keep one's texture when they are exporting to FBX. I am using Blender 3.2.2, but should be the same for 2.8 and up. (The mesh I am using in this tutorial belongs to Dallo5013. Do please check out her tutorials as well.
/ phonenixstryker …...My Insta
https://teraknight.booth.pm/ …....My vroid/Booth shop
/ @dallojoywinterwulf .....Dallo5013's Youtube