It seems like this feature won't be implemented by Ledger (judging by their response on the GitHub page).
I read it different, it seems to be pretty easy if you know how to extract the data out of the .json...
I tried to find the json file that they mentioned contains transaction history (accounts.json) but got no result. Anybody knows where it is? I'm running the latest Ledger Live (still at 1.4.2).
settings => help => view user data.
this opens the ledger live dir and there you have to look at a file called app.json (not accounts.json). its only usable if you have not encrypted your ledger live.
OP, I think you should switch to Trezor for the sake of simplicity.
thats what I do too...