Hyper+key combinations not registered in MacOS

Consider this code example, modelled after the lw-dir/config/mac-key-binds.lisp

(flet ((mac-bind-key (command key &rest specific)
         (if specific
             (apply 'editor:bind-key command key specific)
           (editor:bind-key command key :global :mac))))
  
  (mac-bind-key "Beginning of Line Cancelling Selection" "Hyper-Left")
  (mac-bind-key "Beginning Of Line After Prompt Cancelling Selection" "Hyper-Left" :mode "Pc Execute") 
  (mac-bind-key "End of Line Cancelling Selection" "Hyper-Right")
  (mac-bind-key "End Of Line After Prompt Cancelling Selection" "Hyper-Right" :mode "Pc Execute”) 

  ;; not working below
  (mac-bind-key "Forward Form Cancelling Selection"   "Hyper-l")
  (mac-bind-key "Backward Form Cancelling Selection"  "Hyper-j")

  (mac-bind-key "Forward Paragraph"   "Hyper-i")
  (mac-bind-key "Backward Paragraph"  "Hyper-k”))

It appears that the editor ignores all combinations of Command key + alphanumeric characters. It works for the cursor keys, up-down, left-right. Only the key combinations visible in the top menu work and those cannot be reassigned.

I think remember in the docs somewhere it said that a command+key combination should be registered as a menu shortcut for it to work, but I can’t find it now. Is there no realistic way to make use of the key in the editor on macos?