I've seen (via Little Snitch) at different times, Apple Photo has been downloading data from Amazon, at&t cloud (?) and Azure — at least it's what I allowed it

I've seen (via Little Snitch) at different times, Apple Photo has been downloading data from Amazon, at&t cloud (?) and Azure — at least it's what I allowed it to use up until now. I didn't see Google yet, probably, it's recent development.