It has been already discussed and patched for Leaf 2 at
https://www.mobileread.com/forums/sh...d.php?t=349950. The patch is confirmed to work, here is the patched framework for these keys:
Onyx/Leaf2/Leaf2:11/2022-10-29_19-11_3.3.1_8c9d49397/1583:user/dev-keys
https://dl.dropboxusercontent.com/s/...-framework.jar