I haven’t upgraded to Inkscape 1.0.1 yet and am not sure about living hinge extensions at this time for Inkscape.
Looks like the most common one has been updated: https://inkscape.org/~drphonon/★living-hinge-creator
https://www.festi.info/boxes.py/ works great for generating living hinges of all kinds. You can then import the SVG into Inkscape and customize as needed.