\documentclass{article}

\usepackage{fontspec}

\setmonofont[
  Contextuals={Alternate}
]{Fira Code}

\makeatletter
\def\verbatim@nolig@list{}
\makeatother


\begin{document}

\begin{verbatim}
           .= .- := =:=
        == != === !== =/=

    <<- <-- <- <-> -> --> ->>
<=< <<= <==    <=> => ==> =>> >=>
    >>= >>- >-     -< -<< =<<
        <~~ <~ ~~~ ~> ~~>

     <<< << <= <>  >= >> >>>
            <| <|> |>

            <$ <$> $>
            <+ <+> +>
            <* <*> *>

       \\ \\\ {- -} // ///
          /* /** **/ */ 
      </ <!-- www  --> />
      0xF  9:45  m-x *ptr

       ;; ;;; :: ::: !! !!!
       ?? ??? %% %%% && &&& 
       || ||| .. ... ..< []
       -- --- ++ +++ ** ***

          ~= ~- -~ =~ ~@
        ^= ?= /= /== |= ||=
           ## ### ####
         #{ #[ #( #? #_ #_(


a*b a*A B*b A*B *a *A a* A*
a-b a-A B-b A-B -a -A a- A-
a+b a+A B+b A+B +a +A a+ A+
a:b a:A B:b A:B :a :A a: A:
\end{verbatim}
\end{document}
