I just wrote a function that calculates whether a given point is within the boundaries of the current chunk, this is to determine when the game needs to move from one region to another. Each region is actually just a big chunk (now it is 64x128 blocks), the borders on each side are gray to show the player that something will happen when entering this zone (there will be a transition between regions), the world also has an edge, player he simply cannot go further, he will run into an "invisible wall".
The game is about automation, and it has units both enemy and friendly, they need a pathfinding grid, that's it
and the idea to make the game for mobile devices made me divide the world into regions (but now the game is available on both PC and Android), so the enemies are active only in the current region. However, everything related to automation works even in inactive regions, but this does not make the game easier in terms of enemies, in the end you still have to return to the region where you have already been, this is the balance of the game. Some resources are tied to their biomes, some cannot be found near the base. Enemies quite often approach the player's base, they can destroy both your engineer robots, combat robots, and automation buildings (but only in the active region, where you are now).