Possible fix for lack of mob spawns:
1. Set game to Hard Mode
2. /config/performant-common.toml spawnInterval = 1
3. /config/performant-common.toml entityDensity = 100.0
100 might be too much. It might overwhelm the Nether, or a poorly designed mob farm, that lets mobs build up, might make your game unplayable. Try setting it lower and let me know what you think is right. The first 2 are not enough on their own, but I’m unsure if they have a multiplicative effect and are needed to make the entityDensity work.
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