Most people considered that the Ben Simmons drama will now be over when he was traded to Brooklyn Nets, but still, the saga continues and there's no official timeline for his return. It's not something about injury (if any) or anything else but it really does have another reason. As per report, he's already cleared to play coming from his back injury and already doing some shootings, etc.

As also stated, he is currently in the development of strengthening his legs and back. Is that can be considered a reason not to play at the moment?

Well then, so be it. Before talking about playoffs though, the Nets have to survive the play-in first though.