Yep, I think that is likely. In fact it is encouraged. The codebase has instructions for running on Google Cloud via Kubernetes:

https://github.com/axiom-org/axiom/tree/master/testnet

Being decentralized means that the same backend logic can run on any cloud provider, or on a simple server connecting to the internet. But it's okay if in practice many of the hosting providers are running on top of cloud providers.