What does Photoshop upload when using AI Generative Fill

My company uses Photoshop to create artwork for our products - the security and privacy of our work during production is very important. Currently the AI features are blocked (the internet access Photoshop needs is blocked) due to the concerns.

To save time the artists would like to make use of generative fill to remove objects from some artwork before painting over the area with new content. We don't want to use it to actually generate artwork, just give us a better version of the content-aware fill.

The sticking point for my company is nobody knows what Photoshop is uploading, what happens to that data, how much of our art it uploads, could what it upload ever be leaked/stolen by a thrid party. We can't find any usful information that would make the legal department happy.

Does someone know if there is a in depth article on the subject from Adobe or a legal representative we can talk to?

Many thanks

Simon