Swell Assortments

All of these are configurable in the 1.20.1 version:

Players can't attack Villagers, Iron Golems, Guard Villagers, and Golem Healers. They also get bonus regeneration when taking damage, and Iron Golems have a Thorns effect, they reflect damage back to their attackers.

Beacons are Chunk Loaders (9x chunks around Beacon).

Beds can't be placed or dispensed in the Nether and End.

When players respawn, they have absorption hearts that decay over ten minutes.

Players are guaranteed to spawn on the ground instead of any trees, even with mods like Biome Spawning Point.

Multiple Wandering Traders can spawn on a server at the same time (per player but can't spawn within 10 chunks from each other).

Wolves spawn with different health and size, and can be bred to have even more health and a bigger size, essentially Dire Wolves naturally do twice as much damage but that sccales with how much of their current health they have. Wolves with Less Max Hp are faster.

When the Ender Dragon spawns, it has double HP and everything that spawns after its initial spawn has double HP as well.

Fire doesn't spread on Wooden planks blocks, or fences, stairs, etc... (Logs still burn).

Waystones become Unbreakable after a player places them down.

Reinforced Deepslate is Unbreakable.