I've seen speedrunners speedrun as a duo on the same world in Minecraft. How to do that with someone who is not on my LAN? I am looking for an option other than making a server and generating a new world everytime since it would take too long because the server would have to keep starting and stopping.

Ask this in the Minecraft forum.

@Pear Link?

https://www.speedrun.com/mc/forum If you are on bedrock edition: https://www.speedrun.com/mcbe/forum

In the future, you can find it yourself by typing “Minecraft” into the search bar on the top of the screen. Or, you could put “Minecraft Speedrun.com” into Google.