Checklist in beamer using enumitem package

Just use the classic itemize environment. Together with the symbols from https://tex.stackexchange.com/a/313337/36296 this gives:

\documentclass{beamer}
\usepackage{pifont}

\newcommand{\cmark}{\ding{51}}%
\newcommand{\xmark}{\ding{55}}%
\newcommand{\done}{\rlap{$\square$}{\raisebox{2pt}{\large\hspace{1pt}\cmark}}%
    \hspace{-2.5pt}}
\newcommand{\wontfix}{\rlap{$\square$}{\large\hspace{1pt}\xmark}}


\begin{document}

    \begin{frame}
        \begin{itemize}[<+->]
            \item bla

            \begin{itemize}[<+->]
                \item[\done] blub
                \item[\wontfix] bla
            \end{itemize}

            \item blub
        \end{itemize}
    \end{frame} 

\end{document}