\usepackage{booktabs, array, enumitem, ragged2e, tabularx, makecell}
\setcellgapes{4pt}
    \usepackage[showframe]{geometry}
    \newcommand{\tablistcommand}{%
      \leavevmode\par\vspace{-\baselineskip}%
    }

    \newlist{tabitemize}{itemize}{1}
    \setlist[tabitemize]{%
      leftmargin = * ,
      label = \textbullet ,
      nosep ,
      before = \tablistcommand ,
      after = \tablistcommand
    }