WikiTree doesn't do uploads of DNA. You can record your DNA test against your profile on WikiTree.
A third party site where you can upload your DNA is Gedmatch.com People can then compare your upload against theirs. (They can't see your raw data.) WikiTree lets you record your GEDmatch 'kit number' against your profile if you want to, and cooperation between the two sites lets people using GEDMatch easily click to see you on WikiTree.
Tim