I'm not a doctor and this is just my opinion so don't quote me on this.
I'm sure that acupuncture is beneficial for erectile dysfunction if the causes are psychological, acupuncture is known for improving mood. But if the cause of erectile dysfunction is a physical injury or something similar, there is no way that acupuncture will work.
I also think that the effect of acupuncture may be temporary. So it might work while the individual is receiving treatment, but when the sessions are over, I don't think the effects will continue. So I don't think that acupuncture is a cure for erectile dysfunction, but it can be used alongside other treatments for additional benefits. This is just my two cents on the topic.