Access screen and/or reset a broken screen smartphone?

Hello everyone,

I broke my Xiaomi phone a few days ago. The screen is not functional. However, I believe everything else functions.

Exists a means of either:

connect the device to a computer ideally Linux to view the screen? I do not believe that USB debugging was turned on. Even though I am not sure if the phone is turned on or off right now it might be requesting a code to turn on ADB does not display my device when plugged in.

or just reset everything completely so that my info is secure and I may sell it with confidence.

I would appreciate any assistance, thanks.