Can also throw out that if you're in a state with legal cannabis - CBG/CBN can be helpful as well.
From an AI summary but this is in congruence with my understanding:
Clonidine's utility in opioid withdrawal comes from agonism at a2 receptors which CBG also has - managing excessive adrenaline which has an excitatory effect that goes wild during opioid withdrawal. It additionally reduces blood pressure which can be helpful as well. CBN is relaxing in general through it's impacts on the cannabinoid system having an anti-anxiety and focusing effect.
You're also right in that kratom itself isn't going to get you off of opioids, but in my experience, kratom can be very useful for tapering as it is less gripping than 7-oh. Though,
@Skorpio has mentioned that 7-oh itself may actually be easier to taper as it is a more discrete chemical with a singular mechanism of action versus the broad and sloppy effects profile of full spectrum kratom alkaloids which operate on a number of different systems in different ways.
I can also suggest using memantine or some other NMDA receptor antagonist if accessible.