Adding theme JS library in custom module

My theme documention.libraries.yml file is defined as follows :

global-styling:
  version: VERSION
  css:
    base:
      styles/dist/styles.css: {}
tocbot:
  js:
    libraries/tocbot/tocbot.js: {}
    js/tocInit.js: {}
  css:
    layout:
      libraries/tocbot/tocbot.css: {}
layout_tweaksLib:
  js:
    js/layout_tweaks.js: {}

My custom module implements a custom template which also requires the theme functionality defined in tocInit.js. So I'm trying to include the tocbot library from my theme in my module.

I have tried including a dependencies clause in my_module.libraries.yml file, resulting in the following :

my_module:
  js:
    js/my-module.js: {}
  dependencies:
    - documentation/tocbot
  css:
    component:
      css/my-module.css: {}

However, the tocInit.js script is not being loaded on the modules' custom template.

I would appreciate some help, please.

From documentation.libraries.yml, extend the module's definition of the my_module library to include documentation/tocbot's assets using libraries-extend.

# documentation.libraries.yml
libraries-extend:
  my_module/my_module: 
    - documentation/tocbot