Are supports really needed for this?

I enabled supports and after slicing, Bambu Studio generates supports for just one side. Why just one side, is it really needed at all?

https://preview.redd.it/kevu2vrjz47h1.png?width=1676&format=png&auto=webp&s=dcc03214fc91e96b4bbecb0baaa7c28fcee9e0aa