Customizations do not carry over to other mac when using universal control. I already read article: https://support.logi.com/hc/en-us/articles/5113757817879
which says that you have to connect the mouse directly to other computer or use FLOW to use customizations. However, I have been using a paid third party app - Sharemouse for the last couple of years with my Logitech devices and it always successfully carries over the customized settings so I know settings can be carried over wirelessly without FLOW. I tried FLOW multiple times and it is super clunky. ShareMouse is way smoother and you can drag and drop files from one computer to another with it unlike FLOW. So far universal control is as good as ShareMouse but cannot carry over Logitech customizations. Please make the customizations compatible with universal control because it is possible. ShareMouse can do it.