move appendix to next page overleaf
documentclass{article}
usepackage{appendix}
usepackage{etoolbox}
% Inserts clearpage before begin{appendices}
BeforeBeginEnvironment{appendices}{clearpage}
% Inserts clearpage after end{appendices}
%AfterEndEnvironment{appendices}{clearpage}
% Inserts clearpage before every section within appendices environment
%AtBeginEnvironment{appendices}{pretocmd{section}{clearpage}{}{}}{}
begin{document}
section{Pre1}
section{Pre2}
begin{appendices}
section{App1}
section{App2}
end{appendices}
section{Post1}
section{Post2}
end{document}