and Muxsan as well.
They use a MITM (Man In The Middle) arrangement, an additional interface that sits, on the Canbus, in between the BMS and the Car Electronics.
Have a look:
https://twitter.com/muxsan_ev
https://muxsan.com/English/index.html
Long silent thread but maybe still worth a shot.
Couple of custom screens available here:
https://www.forumelettrico.it/forum/schermo-personalizzato-leafspy-pro-per-leaf-gen1-2-t14811.html#p165482