mesh not appearing in scenes?

hello i'm back with another little problem!

i have a pre-made mesh (xps) and texture, but when i upload them onto my sims rig in blender, the mesh doesn't appear in the scenes window. not sure how i can cut numbers if it doesn't appear :/ i've tried joining it to a sims default hair mesh but that dissapeared too. i encountered this issue on the last hair i converted but i have no idea how i fixed it haha

edit: nevermind i imported it into s4s and it worked fine