Hello I just got my new Lg v30 a few days a go, but I could not hope to notice that it won't let me Uninstall apps from the home screen my Lg v20 allowed me to do this I dont know why the v30 dont.
Are you using the "one screen" home screen or the app drawer?
Which apps are you trying to uninstall? Many pre-installed apps cannot be uninstalled, just disabled. However, the built-in cleaner app that wants to remove "unused" apps on a monthly schedule did get rid of some of the pre-installed games when I waited long enough.