\documentclass[compress,aspectratio=169]{beamer}
\input{./beamer-setup}

% \usepackage[style=authoryear]{biblatex}
% \addbibresource{reference.bib}

\title{Title}
\subtitle{Subtitle}
\author{Author}
\date{\today}
\institute{University of XXXX}

\AtBeginSection[]
{
    \begin{frame}{Outline}
        \tableofcontents[currentsection,currentsubsection,
            hideothersubsections,sectionstyle=show/shaded]
    \end{frame}
}

\begin{document}

\begin{frame}[plain]
    \titlepage

    \begin{center}
        \small Joint work with XXX and XXX.
    \end{center}
\end{frame}

\begin{frame}{Outline}
    \tableofcontents[sectionstyle=show,subsectionstyle=show/shaded/hide,
        subsubsectionstyle=show/shaded/hide]
\end{frame}

\section{Introduction}

\begin{frame}{Frame 1}

\end{frame}

\section{Body section A}

\subsection{Subsection A1}

\begin{frame}{Frame 2}

\end{frame}

\begin{frame}{Frame 3}

\end{frame}

\subsection{Subsection A2}

\begin{frame}{Frame 4}

\end{frame}

\section{Body section B}

\begin{frame}{Frame 5}

\end{frame}

\section{Conclusion}

\begin{frame}{Conclusion \& Future work}

\end{frame}

\begin{frame}[plain]
    \vspace{0.3\textheight}
    \Huge{\centerline{\color{simplebeamercolor}\textbf{Thank You!}}}
\end{frame}

\end{document}