Optimization for MONOLIT – RESPONSIVE ARCHITECTURE WORDPRESS THEME

Hello, I am optimizing MONOLIT – RESPONSIVE ARCHITECTURE WORDPRESS THEME the web for Google and GTMetrix, everything has been optimized correctly except for the mobile version in Google. I would like to install a child theme and be able to defer the loading of the javascript since the main problem is the time in which the main thread processes, do you have any code that you recommend?

Also … There is a plugin called Assets Clean UP that in its PRO version differs the loading of Javascript, the problem is that I do not know the compatibility …, or maybe … is there a plugin that you recommend ?. Thanks!