Which storage is AppSheet trying to access?

When accessing an app created with AppSheet, where does the access occur other than the app link?
In order to apply for permission to AppSheet from our corporate intranet, we need to apply internally for all types of communications.
When I checked in the debug mode of Chrome, the following communication was confirmed.

fonts.gstatic.com
fonts.googleapis.com
strage.googleapis.com

The links for Googleโ€™s public storage are below, but what are the bucket names and object names?
https://storage.googleapis.com/BUCKET_NAME/OBJECT_NAME

[Google reference page]
(Accessing public data  |  Cloud Storage  |  Google Cloud)

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Steve
Platinum 4
Platinum 4

This an enormously broad question, and any answer you get is likely to shift frequently over time as AppSheet, Google, and other integral services evolve.

The only information AppSheet provides for this sort of question is here:

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