Connecting to your "Escape Key Server" and having a dedicated $700+ device to replace one physical key on your keyboard is the very essence of the phrase "Over-engineered".
While I understand the frustration, we have to remember that you will already have an escape key while using terminal (the default touchbar has an 'esc' key at all times unless a specific program overwrites it like Photos, or Final Cut, or Photoshop).
And if for some reason, some other program/plugin that you downloaded has taken hold of your touchbar to display other things you can ALWAYS press the 'fn' (function) key to display not only the escape key, but all of the traditional F1-F12 keys.
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Like I get(/hope) this is a joke but there's karabiner
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"This is garbage code that I wrote to amuse myself, don't depend on it, unless you'd really like to for whatever reason."