In order for us to help, would you be able to post what you are expecting as a result, maybe a screenshot of the expectation, with the code snippet you are using? Perhaps your institute has a template you could share?
Is this code snippet like the one you are using?
= Table of Contents
#outline(title: none)
#pagebreak()
= First Chapter
What is missing? Or what are you expecting? And what is that numbering you are referring to? A page number?
Edit:
Maybe you have numbered headings and want to avoid numbering the Table of Contents?
#set heading(numbering: "1.1.")
#heading(numbering: none)[Table of Contents]
#outline(title: none)
= First Chapter