This mod allows you to prevent mobs from being spawned.

In this mod, I created these conditions.

Biome
Entity type (zombie, skeleton, bat, etc.)
Entity classification (Monster, Creature, Water Creature, Water Ambient, etc.)
Dimension (over world, nether, the end)
Position (x, y, z coordinate)
Spawn reason (natural, spawner, spawn egg, etc.)
Light level

You can make own rule by combining the conditions.

Rules can be added/removed via command.

/limitmobspawn query
/limitmobspawn add
/limitmobspawn remove

To change the number of mobs spawned from default Monster Spawner, execute this(1.18 only)

/limitmobspawn spawner spawnCount <new count>

To change the limit of numbers of mobs which can newly spawn, execute this.

/limitmobspawn category_limit set <category> <limit>

These are the default values in vanilla.

Monster: 70
Creature: 10
Ambient(bats): 15
Axolotls: 5
Underground Water Creature: 5
Water Creature: 5
Water Ambient: 20

To add rules, make data pack. In the data pack, create "limit-mob-spawn" directory and place rule file(json) in the dir. See Official Wiki for more detail of data pack.

datapacks in each world

└─pack.mcdata

└─data

└─(name space)
└─limitmobspawn
└─demo1.json

└─other rule files

Follow these link to see example rules.

1.16.5: this

1.17.1: this

1.19.2 Example Datapack

See this page for change log.

Limit Mob Spawn