When I'm recording with OBS, it just shows Minecraft, and not the LiveSplit timer. How do I show both?

With obs game capture minecraft then add overlay source that is for display capture then name it (you don't have to) continue it should ask what you want to capture and you click livesplit!

It doesn't show overlay source.

I have a scene in OBS that has a window capture and a game capture source. I set the window capture to the Livesplit timer and the game capture to minecraft. That's all you need to do. I hope this helps in any way!