Which sub processors are used in Frankfurt / Amsterdam when using Fly.io's services?

Dear Fly.io and other users in here.

I am part of a start-up that has started building our service with fly.io’s service. Currently we are in the process of making our own DPA in which we need to map out the sub processors that (as well as their sub processors) that handle our data.

It is however not totally clear from the listed sub-processors on the fly.io website, which sub processors are being using when we deploy our app.

We are deploying our app in Frankfurt at plan to have a backup in Amsterdam. Can you help me map which sub processors are being using at those two locations?