I want to drop a loot when you throw an egg in my forge 1.19 mod. What condition can I use to make the item drop when you throw an egg? 

I all ready tried this 

{
  "type": "scorpiamod:add_item",
  "conditions": [
    {
      "condition": "minecraft:entity_properties",
      "entity": "this",
      "predicate": {
        "type": "minecraft:egg"
      }
    }
  ],
  "item": "scorpiamod:egg_shell"
}

 

And I'm wondering how you can drop more than one in a loot_modifier item since only one item is dropped in my code.

{
  "type": "scorpiamod:add_item",
  "conditions": [
    {
      "condition": "minecraft:killed_by_player"
    },
    {
      "condition": "entity_properties",
      "entity": "this",
      "predicate": {
        "type": "minecraft:ender_dragon"
      }
    }
  ],
  "functions": [
    {
      "function": "set_count",
      "count": {
        "min": 3,
        "max": 5
      }
    }
  ],
  "item": "scorpiamod:dragon_shell"
}

 

Thrown eggs don't use loot tables. See ThrownEgg.onHit()

If you want to do something similar for a projectile you didn't write: https://github.com/MinecraftForge/MinecraftForge/blob/1.19.x/src/main/java/net/minecraftforge/event/entity/ProjectileImpactEvent.java

 

On the second part, I have no idea.

If you just post snippets out of context you should expect to have your question ignored.

 

Anyway since this is one of your first posts:

Quote

"type": "scorpiamod:add_item",

This is your loot modifier. How it works is completely up to you.

You can't expect us to support your code. Especially when you don't even show it.