@j8m2p6f, when above command output works for you as it should (when your Librem 5 connected … as described), please rethink (take your time) and implement what your host computer needs for successful reflash of …. At least take a look at following approach: External battery charger for Librem5 - #48 by Quarnero or take another recommended one, yet preparation of your own Linux host computer, for any upcoming task (ensuring preinstalled packages support your intended work) is everything (although even WindowsOS, for example, uuu approach should work too).
EDIT: Below links might be of some help there: