Can someone please tell how to fully remove the background on the autospliiter so that only the text is visible? The opacity slider changes everything (text included), but on speedrun videos they have it exactly how I'm trying to set up. If there's an option to do this I can't seem to find it.

you cant make livesplit itself transparent but you can color key the background out in obs

Don't have obs right now so can't explain in depth but you want to have your background in a specific color, and you want that specific color to be set in your stream soft in order to not show it (just like a green screen)