This is a tree, not a mind map.

A mind map should at least let you create random connections between any 2 topics in addition to the hierarchy.

Ideally it should also let you add callouts, groupings and name the connections.

I'm sorry if I don't get it, but why wouldn't u just use Miro, Mural, Lucidchart, or any of other gazillion free mind mapping aps?

How do you create a new entry?

how much time do you spend to develop this project?