documentclass[tikz]{standalone}

usepackage{tikz}
usetikzlibrary{arrows.meta}

begin{document}
begin{tikzpicture}
  draw[-{Latex[width=2mm,length=3mm]}] (0,0)--(2,0) node[right]{with no line width};
  draw[line width=1.5mm,-{latex[width=2mm,length=3mm]}] (0,-1)--(2,-1) node[right]{with specified line width};
end{tikzpicture}
end{document}