documentclass{article}

usepackage{unicode-math}
usepackage{tikz-cd}

begin{document}
    ( ato b )
    (
    begin{tikzcd}
    aarrow[r]&b
    end{tikzcd}
    )

    setmathfont{Libertinus Math}

    ( ato b )
    (
    begin{tikzcd}
    aarrow[r]&b
    end{tikzcd}
    )
end{document}

documentclass{article}
usepackage{unicode-math}
setmathfont{Libertinus Math}

usepackage{tikz}
usetikzlibrary{decorations.markings,cd}
tikzset{
    -math/.style={
        shorten >=1.4pgflinewidth,
        postaction=decorate,
        decoration={markings, mark=at position 1 with {
                node[scale=1.4pgflinewidth, xshift=-1.7pt,transform shape,rotate=90]{$char"2304$}; }}}
}

begin{document}
    ( ato b )
    (
    begin{tikzcd}
    aarrow[r]&b
    end{tikzcd}
    )
end{document}