Beamer Metropolis Section Page Footnote Without Mark

Question

I want to write a text below the progress bar in a section page in the metropolis theme. I found out that, to some extend, footnotes could serve as a solution. However I did not achieve to remove the footnote numbering. I tried some question/answer pairs, e.g., Footnote without a marker, How to remove footnote marker (number) in Beamer?, Footnote without a marker. But was not successful, as either it gave errors, or, while it removed the footnote marker at the footnotetext, the indicator stayed at the place where the footnote was placed.

Here is a MWE:

\documentclass{beamer}
\usetheme{metropolis}
\renewcommand\footnoterule{}
\begin{document}
\section{over the section bar\footnote{under the section bar}}
\begin{frame}
text
\end{frame}
\end{document}

This produces the following (I want both a's to disappear):

Answer 1

You could temporarily add your text to the end of the section page template (you might have to fine-tune the lengths to put the text exactly where you want it):

\documentclass{beamer}
\usetheme{moloch}% modern fork of the metropolis theme
\renewcommand\footnoterule{}
\begin{document}
{
\addtobeamertemplate{section page}{}{\vskip-1cm\hspace{1.1cm}\usebeamerfont{footnote}\usebeamercolor[fg]{footnote}under the section bar}
\section{over the section bar}
}
\begin{frame}
text
\end{frame}
\end{document}