How to force own template class in sphinx without howto/manual override

Describe the bug

I am using the version sphinx 6.2.1
I want to use my own company template latex class in sphinx for the latex generation only (html unchanged).
I have modified the conf.py in order to use the template class.
The generated tex file contains:
\def\sphinxdocclass{my_own_template}

The class is defined before begin{document}

However, after the begin{document}:
the sphinx class howto/manual override the header of pages as well as the pagestyle with these following lines

\pagestyle{empty}
\sphinxmaketitle
\pagestyle{plain}
\sphinxtableofcontents
\pagestyle{normal}

Is there a way to use a specific template class with using sphinx without getting the sphinxclass which prevents the pagestyle the wanted class ?

Thank you

How to Reproduce

latex_elements = {
'papersize': 'mytemplate',
'passoptionstopackages' : '\PassOptionsToPackage{mytemplate}{my_template}',
'pointsize': '10pt',
'docclass' : 'my_template',
}

latex_docclass = {
'manual': 'my_template',
'howto' : 'my_template',
}

Environment Information

sphinx 6.2.1

Sphinx extensions

extensions = [
    'sphinx.ext.autodoc',
    'sphinx.ext.napoleon',
    'sphinx.ext.mathjax',
    'myst_parser',
    'sphinx.ext.autosectionlabel',
    'sphinxcontrib.bibtex'
]

Additional context

No response

Start with the conf.py settings for latex_elements and latex_docclass, then inspect the generated .tex around the document start and the listed pagestyle commands. Done means the custom LaTeX class controls the page style for LaTeX output while HTML output remains unchanged.