You can get the level editor from here and check the description. https://www.youtube.com/live/RF2qzETZwDc?si=OI1mUg1mnnOMqF0G
I won’t be adding the level editor here because the public release hasn’t come out yet so this is the only link you can get.
If you’re talking about the Dev API 3.5.0.0, then you have to go to MissingTextureMan101’s Discord and go to mod-builds.