\documentclass{scrreprt}
\usepackage[a4paper,
top=2cm,
bottom=1cm,
includefoot,
left=4cm,
right=2cm,
footskip=1cm]{geometry}
\usepackage{scrlayer-scrpage}
\rofoot*{\pagemark}
\cofoot*{}
\pagestyle{scrheadings}
\usepackage{lipsum}
\begin{document}
\chapter{Chapter Title}
\lipsum[1-10]
\end{document}