\documentclass{article}
\usepackage[fontsize=6pt]{fontsize} % will need adjusted if you change the paper size
\usepackage{parskip,tikz,lmodern,fontspec,lipsum,qrcode,hyperref}
\usepackage[%
	papersize={4.25in,2.75in},   % this is a quarter of letter paper, half was too big
   left=11em, right=11em,   % this is adjusted to right inside the QR codes, use the option "showframe" to show the bounding box
   bottom=3em
	]{geometry}
\setlength{\headsep}{4em}
   %  I tried using em and other relative measurements as much as possible so that size conversions are easy. Metric is objectively better (I will fight you in real life about most aspects of this, I'm actively working on recipe localization), but units are just a social construct.
\pagestyle{empty}
\def\nl{\\\vspace{1em}} % just to give some extraspace between the things

\def\paste{% making it a command so that we can easily make multiple pages, easily undone if you don't like it
%  this is VERY SIMPLE, and on purpose. You don't want something? comment that biznatch out. Everything else should shuffle around just fine.
   {\Huge Title}\\
   {\small Owner}
   \nl{\large Model:} model
   \nl{\large Layout:} layout
   \nl{\large Switches:} switches
   \nl{\large Keycaps:} keycaps
   \nl{\large PCB:} PCB
   \nl{\footnotesize\lipsum[1][1-7] This is just to show that it'll stay between the QR codes "automatically"}\\
   \vfill   % this one makes the event name all the way at the bottom
   {\LARGE \#EVENT-NAME}\\{\tiny\href{https://daviddaily.dev/david/Keeb-Plaque}{daviddaily.dev}}
% This is the QR codes in the 4 corners, pay attention to the labels. This whole section doesn't conform to the margins and stuff, so check yourself
\vspace{-2em}\begin{tikzpicture}[remember picture, overlay]
   \node [below right=0.6em](TL) at (current page.north west){\qrcode{https://daviddaily.dev}};
   \node [below=.1em] at (TL.south){\footnotesize
      Top Left%your label here
   };
   
   \node [below left=0.6em](TR) at (current page.north east){\qrcode{https://daviddaily.dev}};
   \node [below=.1em] at (TR.south){\footnotesize
      Top Right%your label here
   };
   
   \node [above right=0.6em](BL) at (current page.south west){\qrcode{https://daviddaily.dev}};
   \node [above=.1em] at (BL.north){\footnotesize
      Bottom Left%your label here
   };
   
   \node [above left=0.6em](BR) at (current page.south east){\qrcode{https://daviddaily.dev}};
   \node [above=.1em] at (BR.north){\footnotesize
      Bottom Right%your label here
   };
\end{tikzpicture}\newpage}

\begin{document}{\fontfamily{lmss}\selectfont\begin{center}
%\setmainfont{[Hellvetica.ttf]}  % uncomment if you want a better font
\paste
\paste
\paste
\paste
\end{center}}\end{document}