Keyboard type error on default macbook pro (wrong special char)

[Lezzio]

Problem :
When I enable my karabiner on the apple internal keyboard the special char <> turns into ²> (French layout). It doesn't happen on external keyboard after doing the keyboard type identification within the System preferences. But it doesn't work at all for the internal apple keyboard. I can't seem to find a solution to fix it, with the karabiner custom scripts the ² is not allowed anyway.

Context :
I've changed from Windows to a macOS machine (MacBook pro 16 inch). New keyboard layout and shortcuts has been total hell for me so I love Karabiner to make me feel home and back on track for productivity. I've done my own scripts to sure my beloved shortcuts are present but I can't manage to solve this problem.