Migrate manny thanos clusters into one with multi-tenancy

[Avigdorrr]

Currently we have a lot thanos clusters (25 clusters) that each have a querier, receiver, store and an object storage bucket. We want to migrate to a big cluster with multi-tenancy.
Is there a way to migrate the old data in each bucket to a new bucket with blocks that will consist that data in a multi-tenancy format?
It means it needs to edit the blocks to match the multi-tenancy way with a tsdb per each tenant

I currently have that data with the label key “env” for each cluster. so if it possible to order and group the new blocks by that label values and make that an external label, it seems like it will do the work

Any way that I can achieve that goal?