Hi there Rebecca and thanks for your great question. Although our technical writing team is occupied with other device teardowns, you're more than welcome to create a teardown of the device yourself.
Looking at other similar devices on our website, it seems that the manufacturer does not sell screen replacement parts for many of their models. Here's a link to the Fitbit forum discussing the screen replacement for the Charge 2: https://community.fitbit.com/t5/Charge-2/Replacement-screen-for-Charge-2/td-p/2321279
