Quarto - RStudio - What is the style for code chunks'

I am new to quarto and I am trying to learn how to create a docx document.
I would like to control the style of the code chunks but the generated file does not have a style associated with the code chunks.
I have tried with and without using the "reference-doc: custom-reference-doc.docx" setting.
In both cases the code chunks do not have a style associated with them.

I believe that I will have to create a style in the "custom-reference-doc.docx" but I do not know what name that style should have.
Any suggestions?


The style is named 'Source Code', but it's not displayed in the gallery by default, which caused confusion.