Creating two table of contents with different depths in R Markdown - r-markdown

Question

I created my lecture notes in pdf format using RMarkdown but it has many subheaders. Because of this, I want to create two different table of contents: first table of contents with 1 depth, then table of contents in 4 depth respectively.
Adding both toc_depth: 1 and toc_depth: 4 did not work.
My YAML header:
---
title: "Lecture Notes"
author: "x"
output:
pdf_document:
highlight: tango
toc: true
toc_depth: 4 #depth table of contents
number_sections: true
documentclass: article
classoption: a4paper
fontsize: 12pt
geometry: "right=1cm, left=1cm, top=1cm, bottom=3cm"
---

Answer 1

As far as I am aware, I don't believe two Table of Contents is possible. One thing you can try is if you don't want a certain heading numbered, you can do
## Including Plots {-}
Which heads it has a header, but doesn't number it in the TOC. Here is the two output differences
without {-}
with {-}
These can be used in places like the Preface, about the authors, etc.

Answer 2

This is not a perfect solution (maybe some with more knowledge could automate this).
The solution works if the intermediate latex file is kept and a short table of contents is manually added using the shorttoc package.
Adding shortdoc:
...
\documentclass[
]{book}
\usepackage{shorttoc}
...
And than adding it between title and TOC:
\shorttableofcontents{〈title 〉}{〈depth 〉}