The prostate is a critical part of male sexual functioning, and treatments can have some very negative
side effects, like ED or issues w/ ejaculation, such as ‘retrograde’, which means it flows backward into the bladder instead of out thru the penis. Some guys find this significantly reduces the pleasure of orgasm.
I don’t know specifically about Cryotherapy, but I’m sure you can find lots of info about it. There are other therapies for this issue (TURP, etc.