Yeah psychedelics definitely won't curb acute withdrawal symptoms from any drug.. that is just not possible on a physiological level. Nor will it remove post-acute withdrawal symptoms resulting from physiological mechanisms. That is to say- no drug can immediately reverse the changes in body and brain resulting from chronic drug use. Really, I think it's even safe to say no drug can reverse the changes at all, and will only cause more unnatural changes.
I don't want to be discouraging, but like Shadow mentioned, it is a very risky idea to be playing with. A large percentage of people who use psychedelics are looking for transformative experiences but if you look at most people who are using them- their life rarely changes dramatically in a positive direction as a result. I'd even argue that it never changes as a direct result of taking a psychedelic. People who wanted to get clean took the drug with the idea and plan to get clean already in their head, and when they come down they will still have to deal with acute and post-acute withdrawals. Then, if they ever relapse(like most everyone does) and get clean- was it the trip that got them clean a second time..? and if it was.. how many relapses is one trip good for?
I know I'm being pendantic, but my point is that no one needs some magic drug to get sober but everyone needs to put in the effort and hard work. There are certain drugs that can help like so called "comfort meds". Psychedelics are still on the fringe and not yet fully understood in a therapeutic context. Even among experienced users there are extremely mixed experiences ranging from euphoria to nightmarish dysphoria. There's also some extremely adverse effects/risks like psychosis and extreme depersonalization, and using while going through withdrawals seems like a recipe for disaster. I've taken droppers full of acid and I wouldn't touch the stuff while going through withdrawals.
Ayahuasca is commonly touted as a sort of magic bullet for opioid withdrawal, but at best those claims are highly deceptive. A millionaire just recently died in Mexico at one of these "rehabs". I personally don't think it is a good idea, but I know there are people who disagree. The original founder of Alcoholics Anonymous started experimenting with LSD years after AA had gained traction across the US. He believed it could serve as the first step of the 12, believing the trip would be a sort of "spiritual awakening". In a lot of ways I agree with him, and for some this might be true. However, when considering the physiological state of someone in withdrawal, particularly the mental state, it hardly seems like a good idea. Someone who is at risk of things like psychosis and probably already experiencing high levels of anxiety, paranoia, depression, and negative thoughts doesn't need a drug to amplify these things.
I'm open to new ideas, but until there is something more than spotty anecdotal evidence, i'm going to stick with comfort meds(including tapering) and talk-therapy(groups, counseling, even talking with friends) as being the current best methods for managing and coping with withdrawal symptoms.