Soft hyphen not visible

[mbertucci47]

The soft hyphen (U+00AD) in the Inria fonts (both serif and sans) is not visible. This is relevant for tagged PDF, see the discussion in latex3/tagging-project#967. Here's a LaTeX example showing the issue (compile with lualatex). Note that "never-ending" is explicitly hyphenated in the dummy text, which is why the hyphen appears there.

\DocumentMetadata
  {
    lang=en-US,
    pdfstandard=ua-2,
    tagging=on,
  }
\documentclass{article}

\usepackage{fontspec}
\usepackage{kantlipsum}
\setmainfont{Inria Serif}

\setlength\textwidth{6cm}

\begin{document}
\kant[1]
\end{document}

With Inria Serif

With Latin Modern