EntityKnockbackEvent not firing for other TNT when a TNT explodes

Expected behavior

I expect the EntityKnockbackEvent to also fire when a primed TNT pushes another primed TNT
Additionally, it would also be nice if there was an EntityExplodedEvent#getEntityList()

Observed/Actual behavior

The event does not fire when event.getHitBy() and event.getEntity() are both TNTPrimed

Steps/models to reproduce

Build a simple cannon like so:

Add the following EventListener:

public class TestListener implements Listener {
    public void onEntityKnockback(EntityKnockbackByEntityEvent event) {
        Bukkit.broadcastMessage("HitBy: " + event.getHitBy().getType() + " Entity: " + event.getEntity().getType());
    }
}

Shoot the cannon

Plugin and Datapack List

FAWE, kotlin-stdlib, LuckPerms, PlaceholderAPI, PlugManX, spark, CustomPlugin

Paper version

[14:46:40 INFO]: This server is running Paper version git-Paper-493 (MC: 1.20.4) (Implementing API version 1.20.4-R0.1-SNAPSHOT) (Git: a6b6ecd)
You are running the latest version
Previous version: git-Paper-485 (MC: 1.20.4)

Other

No response

Start by reproducing the TNT cannon scenario with the provided EntityKnockbackByEntityEvent listener and inspect the event-handling path for TNTPrimed entities. Confirm whether the event should fire for TNT-to-TNT knockback, and separately assess the requested EntityExplodedEvent#getEntityList() API addition; done means the intended behavior is covered and verified.