range={\backprime} or range={"2035} fails

[ghost]

Description

Getting the reversed prime ‵ (U+2035) from TeX Gyre Termes Math fails when the main math font is Cambria Math.

Add info or delete as appropriate:

• Relevant for XeTeX
• Relevant for LuaTeX
• Issue tracker has been searched for similar issues. Closely related (for a different symbol): https://github.com/wspr/unicode-math/issues/451.
• Links to discussion if appropriate. Related: https://tex.stackexchange.com/questions/504897/how-to-get-backprime-if-the-main-math-font-is-cambria-math

Minimal example demonstrating the issue

\documentclass{standalone}
\usepackage{unicode-math}
\setmathfont{cambria.ttc}[FontIndex=1]
\setmathfont{texgyretermes-math.otf}[range={\backprime}]%%% fails
%\setmathfont[Ligatures=TeX,range={\backprime}]{texgyretermes-math.otf}%%% fails
%\setmathfont[Ligatures=TeX,range={"2035}]{texgyretermes-math.otf}%%% fails
%\setmathfont[range={\backprime}]{texgyretermes-math.otf}%%% fails
%\setmathfont[range={"2035}]{texgyretermes-math.otf}%%% fails
%\setmathfont[Ligatures=TeX,range={"2035,\backprime}]{texgyretermes-math.otf}%%%  works
%\setmathfont[range={"2035,\backprime}]{texgyretermes-math.otf}%%%  works
\begin{document}
\(\sigma^{\backprime}\)
\end{document}

Further details

Output:

Expected: σ‵