Hello Emily,
This site (WikiTree) cannot tell you if you match anyone. It has no functionality for people to upload DNA measurements and compare them.
Perhaps you are saying that WT identifies you as a DNA match to those ancestors because your DNA test is listed on their profiles? That just means you would *probably* share DNA with those people if they lived in modern times and could do a test. Once you tell WikiTree that you took a test, that information appears automatically on profiles of your ancestors and cousins who are close enough and biologically linked to you on WikiTree.
If you want to use DNA evidence to support the connections among your ancestors, you need to go to another site where you can compare your DNA with others who claim descent from those same ancestors. You can then write up the results of this analysis on your ancestors’ profiles here on WikiTree.