I tested that when writing the S3 implementation of a Go key-value wrapper [1] and back then "Alibaba Cloud Object Storage Service (OSS)" did not support path-style addressing.

If you're looking for a similarly robust and scalable alternative, Google Cloud Storage is accessible via S3 API when enabling that in the bucket's configuration and it supports path-style access (at least back when I tested the different S3-compatible services).

[1] https://github.com/philippgille/gokv

Not sure but what I heard their API is the exact copy or the S3 API, so you can switch from one to other without any effort.