Are there any alternative therapies to help with rectal prolapse?

It depends on cause: You will first need to focus on the cause and get that resolved. Most herbal remedies are related to keeping your stool soft and soothe the local area discomfort. In general they do not 'cure' rectal prolapse. Biofeedback, acupuncture and muscle stimulation can be helpful for the same reasons.

Not really: Keep the stools soft. Avoid straining especially in a squatted position. Avoid prolonged squatting on toilet.

No: For full-thickness rectal prolapse, surgery is the only option that will correct the problem. There are options available. If not corrected, symptoms may worsen as the prolapse weakens the sphincter and the patient develops more symptoms of incontinence which may become irreversible.