This fell out of the librem5 sim/mmc tray after I used the pin to pull the tray out.
What is this?
Where does it belong?
One or two other users have had this problem when taking apart the Librem 5.
Disassembled my Librem 5 and this fell out
Camera kill switch not working?
Look at the second link for more detailed information. Whether you actually want to tackle this is I suppose up to you.