This page says that the only thing that would be in the cloud is backups which are not only optional, but are encrypted end to end.
In other words, its only on the cloud if you want it to. Now you make a claim that says that it is not the case. So outside of the one exception that you have to opt in to, can you prove your statement correct with a cite?
Nope, I can't.
However- for how long did people say the government was listening/watching/getting information and companies denied it?
I would not be the least bit surprised (in other words- I'm CONFIDENT) any and all information is available outside of the physical phone itself.
With everything else out there, no matter how many times they say it's not and we find out otherwise, why wouldn't this be?
Don't be naive.