While it's not exactly single-click, this new project is migrating the Brave browser and the Electron runtime to macOS 12, with it all tested on a 5,1 Mac Pro and a 2010 MacBook Pro. https://appleinsider.com/articles/26/10/21/this-project-will-help-your-old-intel-mac-stay-on-monterey?utm_medium=social&utm_source=mastodon