Yes they get added to the markdown but not visible to users in the app.
File1
* Test bullet
id:: 61f01da2-6a48-47ae-9c45-7c7a5fce7cc9
* Sub-bullet content
File1 shows up as:
* Test bullet
* Sub-bullet content
File2
* Another test
* ((61f01da2-6a48-47ae-9c45-7c7a5fce7cc9)) - reference
File2 shows up as:
* Another test
* Test bullet - reference
“Test bullet” above is underlined and can be clicked to take you there. Hover shows you the Sub-bullet content in a popup.