I mean, let’s be honest: People do crimes even when they have no material need to do so, so you will always need some form of law enforcement, how should a solarpunk society handle this?
The same is true for a military: As long as there is no world peace or some magical way to shut the outside world out, and as long as other societies exist somewhere nearby (and in today’s world this means somewhere on the same planet), a society needs the means to defend itself… what would this look like?
An anarchist society would need manufacturing capability to create weapons that would be effective against the enemies they faced (much like Ukraine’s local drone construction is essential to their survival). That was an issue in the Spanish Civil war, especially as no outside countries were willing to help logistically except for the USSR, which had strings attached, and was mostly diverted to the Marxist army.
I don’t believe they are. Rojava modeled its society on Democratic Confederalism as laid out by Abdullah Öcalan. Abdullah himself was heavily inspired was inspired by the works of Murray Bookchin, who advocated for a form of Eco-Anarchism, which Solarpunk itself is partly based upon.
I am not saying that Rojava is a solarpunk society, it is not, it’s also not considered properly Anarchist by most Anarchists, but it is currently an existing society that at least is attempting to decentralize societal power in a meaningful way (to varying degrees of success), similar to the Zapatistas.