We started using https://github.com/helfi92/material-ui-treeview/ in https://community-tc.services.mozilla.com/hooks because material-ui did not have a tree view component available at the time, but now they do. Let's move away from what we were using and use material-ui's TreeView component. The demo shows that they support rendering the same tree structure that we have so switching to it shouldn't be too demanding from our end.