I mean, it is said to rule over all aspects of the body and structure. So should be possible, LC's like Regeneration, Blood manipulation, Bone manipulation, Avatars, shapeshifting...
And each facet has a thousand and one applications. Use Avatars in the way we use now, create clones, using "avatars" as the concept of structure and use it to manifest barriers(Instead of spending tons of Qi), or use it like HxH Emission. Had Nicky made Wu Heir fly over a ****ing Dragon Qi-avatar then attack Tigress with it and I'd cry.
Shapeshifting could be used as Wu Heir is already doing, mixing with others Daos to shapeshift into elements. But as Shashwaty pointed we could use it Muzan-like too.
Or assuming one's appearance, camouflaging into the ambient to peek Ruo'er bathing.
Someone need to tell Nicky to read HxH. Emitters and Conjurers are simply gold material for Body Dao. Hell, even JJK has some interesting material with simple barrier techniques...
Actually reading HxH would help his creativity as a whole for every Dao.