0 sats \ 0 replies \ @lrz 13 Jul 2022 freebie \ parent \ on: Secure way to copy LN invoice from phone app to desktop computer bitcoin
You're right, even open source libraries are mostly chinese, go figure.
Are you comfortable with the command line? You could try this webapp (requires nodejs) that in theory lets you scan while being offline: https://github.com/gokulkrishh/qrcodescan.in
I prefer copy-pasting the invoice text. Feels safer and I need no additional tools.