How to create a list in two columns with symbols label

Question

Please consider this MWE:

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage[T1]{fontenc}

\begin{document}

{\scriptsize\begin{itemize}
    \item Item 1
    \begin{itemize}
        \item Item 1a
        \item Item 1b
    \end{itemize}
    \item Item 2
    \begin{itemize}
        \item Item 2a
        \item Item 2b
    \end{itemize}
\end{itemize}}

\end{document}

I want to put Item 2 and its subitems in a new column to the right of Item 1:

However, I do not know how to achieve it.

I tried using tasks package but I am not able to:

1. Find the same indentation of the items with the margin or with their descriptions.
2. Move the second item and its subitems to a new column.
3. Find the same symbol of the middle bar that itemize has at its second depth level (\textendash is a bit shorter).

This is what I tried:

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage[T1]{fontenc}

\usepackage{tasks}

\begin{document}

{\scriptsize\begin{tasks}[style=itemize](2)
    \task Item 1
    {\begin{tasks}[item-indent=2pt](1)
        \task[\textendash] Item 1a
        \task[\textendash] Item 1b
    \end{tasks}}
    \task Item 2
    {\begin{tasks}[item-indent=2pt](2)
        \task[\textendash] Item 2a
        \task[\textendash] Item 2b
    \end{tasks}}
\end{tasks}}

\end{document}

Comparison:

Thanks!

Answer 1

Using multicol package :

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage[T1]{fontenc}
\usepackage{multicol}

\begin{document}


\begin{multicols}{2}
  \scriptsize
  \begin{itemize}
  \item Item 1
    \begin{itemize}
    \item Item 1a
    \item Item 1b
    \end{itemize}
  \item Item 2
    \begin{itemize}
    \item Item 2a
    \item Item 2b
    \end{itemize}
  \end{itemize}
\end{multicols}
\end{document}

Answer 2

Using minipage

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage[T1]{fontenc}
\usepackage{outlines}
\begin{document}
{\scriptsize
\begin{minipage}{.5\linewidth}
    \begin{outline}
        \1 Item 1
        \2 Item 1a
        \2 Item 1b 
    \end{outline}
\end{minipage}
\begin{minipage}{.5\linewidth}
    \begin{outline}
        \1 Item 2
        \2 Item 2a
        \2 Item 2b 
    \end{outline}
\end{minipage}}
\end{document}