documentclass{article}
usepackage{tikz-cd}
begin{document}
[
begin{tikzcd}
        X ar[r] & A &\
        & Ctimes Dtimes F  &\
        &   &\
        &   &\
        &   &\
        &   & B ar[luuuuu, bend left, in=190, out=10]
end{tikzcd}
]

[
begin{tikzcd}
    X ar[r] & A &\
    & Ctimes Dtimes F ar[u, bend left, in=240, out=0] &\
    &   &\
    &   &\
    &   &\
    &   & B ar[-,luuuu, bend left, in=190, out=10]
end{tikzcd}
]
end{document}

documentclass{article}
usepackage{tikz-cd}
begin{document}
[
begin{tikzcd}
        X ar[r] & A &\
        & Ctimes Dtimes F &\
        &   &\
        &   &\
        &   &\
        &   & B ar[luuuuu, bend left, in=190, out=10, dash pattern=on 80pt off 15pt]
end{tikzcd}
]
end{document}

documentclass{article}
usepackage{tikz-cd}
begin{document}
[
begin{tikzcd}[execute at end picture={
clip (C.north east) rectangle (C.south west)
(current bounding box.south west) -| (current bounding box.north east)
-| cycle;
draw[->] (B) to[out=110,in=-90] (A);
}]
        X ar[r] & |[alias=A]|A &\
        & |[alias=C]| Ctimes Dtimes F  &\
        &   &\
        &   &\
        &   &\
        &   & |[alias=B]|B
end{tikzcd}
]
end{document}