Yes, they are skinned meshes, they automatically adapt to the body (these are on Koodie) to center them on the character "just in case." Reset positions, rotations, and scale like in the video.
Import my characters; everything is already done, and in one click, change the clothing configuration. The tights are white in the materials. Adjust the color you want, and you can even change the skin.
It's up to you to suggest ideas. See, I made your high heels in 10 minutes.
However, I can convert all of this into clothing. I would saturate the slots, but you have to go through WLMM (too annoying). Everything is faster here.
Dimestrecu gives you an overview of body, clothing, shoe, and face modifications, skin materials...ect
In the game, the principle is identical, and I think Adeptus must appreciate this diversity.