Currently, it isn't possible to visualize an MLM structure on the Tapfiliate platform.
However, this does not mean that it isn't possible to determine or view the relationships between users that are a part of your MLM program.
You can see affiliate relationships:
in your affiliate's details panel, you can see and change who the parent of that affiliate is.
in the affiliate's full profile, you can see their downline and how much they've earned through it.
in the .CSV file you can export from the Affiliates Overview page - each affiliate's parent id is included.