ctrl + enter and ctrl + backspace don't work after remapping fn to ctrl

[ElSamhaa]

Otherwise, other combinations work as expected, i.e ctrl + c, ctrl + l ...

/etc/kbct.yaml referenced in a systemd service definition:

- keyboards: [ 'Apple Inc. Apple Internal Keyboard / Trackpad' ]
  keymap:
    fn: leftctrl
    leftmeta: leftalt
    leftalt: leftmeta
    leftctrl: fn
    ejectcd: delete
    rightalt: rightctrl
    rightmeta: rightalt

[HappyCthulhu]

Any success with this issue?

I want 2 remap arrows on shortcuts (fn+h/j/k/l) and fn is best choice for this. But i cant make it work properly