Set list of tables and list of figures as section in table of contents

Question

I want the list of figures and the list of tables to appear in my table of contents as sections instead of as chapters. A bit like the elements right above (from summary to acronyms)

A quick reminder that I used

\listoftables

\listoffigures

To automatically generate the list of tables and figures

I also used

\section*{Summary} \label{sec:summary} \addcontentsline{toc}{section}{\nameref{sec:summary}}

To create and and the sections to the table of contents

Answer 1

Suggestion using package tocbasic:

\documentclass{book}
\usepackage{blindtext}% only for dummy text

\usepackage{tocbasic}
\renewcommand*{\listoffigures}{\listoftoc[\listfigurename]{lof}}
\renewcommand*{\listoftables}{\listoftoc[\listtablename]{lot}}
\setuptoc{lof}{leveldown,totoc}
\setuptoc{lot}{leveldown,totoc}

\begin{document}
\listoffigures
\listoftables

\tableofcontents
\blinddocument
\begin{table}
  \caption{A table}
\end{table}
\begin{figure}%
  \caption{A figure}%
\end{figure}
\end{document}

Remark: tocbasic can not be used together with package tocloft or titletoc.

Answer 2

Try this, no need to change any pre-existing code.

% loftoc.tex  SE 600162
\documentclass{report}
\begin{document}
\tableofcontents
\clearpage
\addcontentsline{toc}{section}{List of Figures}
\listoffigures

\chapter{First}

\begin{figure}
\centering
\caption{A figure}
\end{figure}

\end{document}

The macro \addcontentsline is basic LaTeX.