As those IDs will be unique for every console, I'll make this repo into an instruction on how to obtain the IDs yourself. I'll try to keep it updated if there is any update that changes how you can access them on your Xbox.
This repo aims to help configuring the homebridge-smartglass plugin. As Microsoft ended support for Smartglass the Title ID in listTable.txt is just a nice to have but apps won't be launchable anymore.
The TitleID seems to be unique for every installation, below you can see how to get it.
If you have set up homebridge-smartglass or homebridge-xbox-tv, you can get the information for launched software right from your Homebridge logs.
To access those informations on your XBox, do the following:
1st Navigate to the app or game you want to add.
2nd Use the menu button and select "Manage app"
3rd select "File info" in the lower left of the screen
4th The marked areas are the code strips you need to set up the plugins.