How can I produce TeX Gyre Pagella smallcaps using LuaLaTeX?

This is the same basic question as here and here but for LuaLaTeX. I don’t know if I’m missing something but the following does not work for me:

documentclass{article}

usepackage{fontspec}
usepackage{polyglossia}
setdefaultlanguage{english}
setmainfont[Numbers=OldStyle]{TeX Gyre Pagella}

begin{document}
noindent
123456789ABCDEF

noindent
textsc{123456789ABCDEF}
end{document}

The OldStyle numerals come through fine but I cannot get small caps to work no matter what I do. I do not see any warnings or errors in the output when I run lualatex test.tex, and the output contains:

</usr/local/texlive/2020/texmf-dist/fonts/opentype/public/tex-gyre/texgyrepagel
la-regular.otf>

So I think it’s loading the font correctly.

What gives?

Edit: Note, this isn’t just about TeX Gyre Pagella. I can reproduce the same results with e.g., Minion Pro, which I have been able to use with small caps in other programs. I just included TeX Gyre Pagella here because it makes the reproducer easier to distribute.

documentclass{article}

usepackage{fontspec}
usepackage{polyglossia}
setdefaultlanguage{english}
setmainfont[Numbers=OldStyle]{TeX Gyre Pagella}

begin{document}
noindent
123456789ABCDEFabcdef

noindent
textsc{123456789ABCDEFabcdef}
end{document}