Dashed double arrow--tikzcd

Question

I want to draw the following graph using tikzcd.

How should I modify the following？

\begin{tikzcd}
X\ar[Rightarrow, d] \\
Y\ar[d, bend left, "g"]\ar[d, bend right, "f"swap]\\
Z
\end{tikzcd}

Thank you in advance.

Answer 1

You only need to add dashed option:

\documentclass[border=3.141592]{standalone}
\usepackage{tikz-cd}

\begin{document}
    \begin{tikzcd}[labels={font=\scriptsize, pos=0.51}]
X \ar[d, Rightarrow, dashed]     \\ % <---
Y \ar[d, bend  left, "g"]
  \ar[d, bend right, "f" ']     \\
Z 
    \end{tikzcd}
\end{document}