Risks of photographing sensitive information using Android devices?

Sometimes I have to photograph sensitive documents such as bank checks or tax forms etc. Is it completely safe to do with a smartphone, or can there be security threats?

Notably, the legit apps in our phones seem to have a lot of AI activities, changes, and the phones consume approx 100MB to 500MB data per day even when not in use. This makes me think of if there could be security risks or surveillance threats.

Is there any additional risk if the phone is Chinese-originated?