How to add texture on this character

Hello everyone, i have a problem with my character.
I upload character in T-Pose fbx ( my character is split on diferent shape because i want to add diferent texture on him ), but i can’t do that because i don’t know why, because this character is a single mash. Please help me

I’ll assume you’ve used blender. You’ll have to have used different material slots when creating it.
That or have baked textures in a separate program that exports them as a single set of textures like substance painter- in that case you could use 1.

When opening your skeletal mesh in Unreal, you’ll hopefully see an array of material slots. If you just imported a static mesh with no rigging (which you have to make yourself since it’s a custom character), it’s not going to work as a character.
image

You can then select which materials you want to use from the dropdown.