Blender importing accessories help

Hi there, Im new to blender and I’ve been following a YouTube guide, but my character that I can import into the game doesn’t appear with hair or accessories as they are separate from the main body. They all show up in blender and the hair moves with the head but the hair doesn’t appear still in game. Is there a way to make it so they get added in with the rest of the character?

Thanks.

Make sure they are all one mesh / object and are vertex grouped / painted instead of bone-parented.