It depends on how many ancestors of yours are added to wikitree. It you only have 6 ancestors loaded, you have less of a chance of connecting if there are not others in the same area that have done the DNA testing.
I have quite a few generations added and I have hardly any DNA connections. I have some DNA connections at my 8th or 9th set of great grandparents. You only have 3 generations loaded, I think. I have other lines that have 15 generations of great grandparents and I have no DNA connections
If your 'cousins' have not uploaded their own information or the grandparents that you are connected to, you will have no connections. Everyone is not on wikitree, so it depends on that, as well.