tabularray package incompatibility

[mbertucci47]

(As usual no expectation that this should work. Just recording here for completeness.) The tabularray package is not compatible with the tagging code. The example

\DocumentMetadata
  {
    lang=en-US,
    pdfversion=2.0,
    pdfstandard=ua-2,
    testphase={phase-III,math,title,table,firstaid}
  }
\documentclass{article}
\usepackage{tabularray}

\title{tabularray tagging test}

\begin{document}

\begin{tblr}{cc}
A & B \\
C & D
\end{tblr}

\end{document}

gives parent-child warnings like

Package tagpdf Warning: Parent-Child 'P/pdf2' --> 'text-unit/latex'.
(tagpdf)                Relation is not allowed (struct 14, /text --> struct
(tagpdf)                15) on line 19

These warnings appear with just phase-III as well.