I am writing a document in R markdown and changed the font to Arial, with the help of the following YAML-header:

---
title: ""
output:
  pdf_document: 
    latex_engine: xelatex
fontsize: 12pt
mainfont: Arial
---

In my document I am using kableExtra to output a table. However, while the text in the PDF-output is indeed in Arial, the text inside my table is still displayed in the default R markdown font in the PDF-output.

Is there any way to adjust the font family in kableExtra?

Thank you for any tips!