How to draw a rectangle between nodes in TikZ?

Question

I have a beamer frame as shown below. It draws two nodes of tikzpeople and then an arrow between them. However, what I want to draw is a rectangle in the middle of the arrow and write some text inside the rectangle. So something like "NODE --[some text]--> NODE". How can I draw a closed rectangle and fill it with text?

\documentclass[xcolor=table,10pt,aspectratio=169]{beamer}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[american]{babel}
\usepackage{amsmath,amssymb,amsthm}
\usepackage[beamer,customcolors]{hf-tikz}
\usepackage{booktabs} % Tables
\usepackage{tikz}
\usetikzlibrary{
    arrows,
    calc,
    chains,
    decorations,
    decorations.text,
    decorations.pathmorphing,
    matrix,
    overlay-beamer-styles,
    positioning,
    shapes,
    tikzmark
}
\usepackage{tikzpeople}
\tikzset{hl/.style={
    set fill color=red!80!black!40,
    set border color=red!80!black,
  },
}

\begin{document}

\begin{frame}{Test}
\begin{figure}
    \begin{tikzpicture}[font=\small]
        \node[alice,minimum size=1.5cm] (A) {};
        \node[bob,right=8cm of A,minimum size=1.5cm,mirrored] (B) {};
        \draw (A.0) edge[->] node[above] {} (B.180);
    \end{tikzpicture}
\end{figure}    
\end{frame}

\end{document}

Answer 1

Here you have two solutions. The first one draws the node and fills it with white to cover the line which goes behind it. The second is better when you want to respect the background. In this case, you draw the node and later on two lines between them.

\documentclass[xcolor=table,10pt,aspectratio=169]{beamer}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[american]{babel}
\usepackage{amsmath,amssymb,amsthm}
\usepackage[beamer,customcolors]{hf-tikz}
\usepackage{booktabs} % Tables
\usepackage{tikz}
\usetikzlibrary{
    arrows,
    calc,
    chains,
    decorations,
    decorations.text,
    decorations.pathmorphing,
    matrix,
    overlay-beamer-styles,
    positioning,
    shapes,
    tikzmark
}
\usepackage{tikzpeople}
\tikzset{hl/.style={
    set fill color=red!80!black!40,
    set border color=red!80!black,
  },
}

\begin{document}

\begin{frame}{Test}
\begin{figure}
    \begin{tikzpicture}[font=\small]
        \node[alice,minimum size=1.5cm] (A) {};
        \node[bob,right=8cm of A,minimum size=1.5cm,mirrored] (B) {};
        \draw (A) edge[->] node[draw, fill=white, text width=2cm, align=center] {some text inside a rectangle} (B);
    \end{tikzpicture}
\end{figure}    

\begin{figure}
    \begin{tikzpicture}[font=\small]
        \node[alice,minimum size=1.5cm] (A) {};
        \node[bob,right=8cm of A,minimum size=1.5cm,mirrored] (B) {};
        \path (A) -- node[draw, text width=2cm, align=center] (C) {some text inside a rectangle} (B);
        \draw[->] (A)--(C);
        \draw[->] (C)--(B);
    \end{tikzpicture}
\end{figure}    

\end{frame}

\end{document}

Answer 2

\documentclass[xcolor=table,10pt,aspectratio=169]{beamer}

%\usepackage[T1]{fontenc}
%\usepackage[utf8]{inputenc}
%\usepackage[american]{babel}
%\usepackage{amsmath,amssymb,amsthm}
%\usepackage[beamer,customcolors]{hf-tikz}
%\usepackage{booktabs} % Tables
\usepackage{tikz}
\usetikzlibrary{
    arrows,
    calc,
    chains,
    decorations,
    decorations.text,
    decorations.pathmorphing,
    matrix,
    overlay-beamer-styles,
    positioning,
    shapes,
    tikzmark
}
%\usepackage{tikzpeople}
%\tikzset{hl/.style={
%       set fill color=red!80!black!40,
%       set border color=red!80!black,
%   },
%}

\begin{document}
    
    \begin{frame}{Test}
%       \begin{figure}
            \begin{tikzpicture}[font=\small]
                \node[]at(0,0) (A) {};
                \node[]at(5,0) (B) {};
                \draw (A.0) edge[->,]node [midway, fill=white] {Label Text} (B.180);
            \end{tikzpicture}
%       \end{figure}    
    \end{frame}
    
\end{document}