Helpful. Do you know of any way to export the screen time from iphone/ipad?

Unfortunately not, although it appears to be possible on jailbroken devices. https://www.mac4n6.com/blog/2018/8/5/knowledge-is-power-usin... (found via this gist: https://gist.github.com/0xdevalias/38cfc92278f85ae89a46f0c15...)