remap escape key with Ukelele

Question

I have the following keyboard:

I would like the change the top left key from "escape" to @/# and map Escape on "option + @".

So I created a new keymap with Ukelele and installed it:

The problem is the escape key has steel the same behavior, when I press the top left key it steel execute has escape key instead of "@/#"

I can confirm my new map is installed (I replaced the A by a K and I have a K when I press A).

There is something special to do to replace the Escape key ?

Answer 1

From what I understand of Ukelele, it doesn't remap 'functionality', just 'characters'.

To remap functionality, you're more likely to need Karabiner-Elements