Great video on Unreal’s Mesh Modeling tools I used to create all of the cube levels/shapes inside Tidy Assets.
You need to enable the plugin in the project settings first:
It does look slightly different in UE5, here is where to access it:
Video about it here:
https://www.youtube.com/watch?v=ZF99vhclNeg
Here is an included sample Challenge level in the project, created using the same CubeGrid tool, and using the BP_Panels and other features of the project.