Can Pandoc convert EPUB to standalone HTML if the text content files are located in the root directory of an EPUB file?

I use the following command (in Windows 10 PowerShell) for Pandoc (version 3.9) to convert EPUB files to standalone HTML files (that is, one EPUB file must be converted to a single, independent, self-contained HTML file):

.pandoc -f epub -s -t html --embed-resources=true "D:efinput.epub" -o "D:efoutput.html"  

But the output is often incorrect: the text content is missing. It happens when the text content files are located in the root directory of an EPUB file. For example, if an unpacked EPUB file has the following structure (the > character precedes a directory name):

> META-INF
    container.xml
  abcd1.html
  abcd2.html
  abcd3.html
  abcd4.html
  book.css
  content.opf
  cover.jpg
  g.jpg
  mimetype
  toc.ncx

Here the text content is in the files whose name starts with abcd: they are in the root directory.

Or this structure:

> META-INF
    container.xml
  content.opf
  cover.jpg
  index.xhtml
  mimetype
  page_styles.css
  stylesheet.css
  titlepage.xhtml
  toc.ncx

Here the text content is in the file whose name is index.xhtml: it is in the root directory.

For these two files, my command does not work: the output is useless because the text content is missing in the produced HTML file. The command works as expected only when the text content files are located in some directory. For example,

> META-INF
    container.xml
> OEBPS
    content.opf
    image_a.jpg
    nav.xhtml
    part0000.xhtml
    part0001.xhtml
    part0002.xhtml
    stylesheet.css
    toc.ncx
  mimetyoe

Here the text content is in the files whose name starts with part: they are in the OEBPS directory. Or this structure:

> META-INF
    container.xml
> text
    part000.html
    part001.html
    part002.html
  content.opf
  cover.jpg
  mimetype
  page_styles.css
  stylesheet.css
  titlepage.xhtml
  toc.ncx

Here the text content is in the files whose name starts with part: they are in the text directory. For these two files, my command produces the expected output.

Is it possible to write a command for Pandoc to produce the correct (expected) output from any valid EPUB file, including the files of the problematic type? If yes, how?