I think a reasonable touchstone here is the open source rts engine called the Spring RTS Engine. https://springrts.com/

There have been lots of games (mostly but not limited to total annihilation-likes) built on the Spring Engine over the years, and I think the engine has a name well suited to an open source platform for building games on. It is short, easy to remember and crucially though the obvious motivation to build the Spring Engine was to make a spiritual successor to Total Annihilation in a 3D engine with arbitrary camera movement…. the name “Spring Engine” doesn’t artificially limit the suggested possibilities of the engine to just TA clones (see Zero-K or Spring 1944).

I would go with something really simple like Block Engine or Blockworlds Engine and just toss out the Minecraft association anyways, but that is my own two cents no one asked for lol.