Mod for 1.20.1 that adds vanilla-friendly grenades?

More specifically, an only damage dealing grenade. A fire-starting grenade, and a light HE one (like, one block radius).

I am looking everywhere for such a thing, but I only find hilariously OP ones like Grenade Variety, or ones that almost fit the bill, but one part of them does not work (Counter Strike grenades, where the molotov does not actually start a fire).

If there are not any mods that add stuff like this (I presume not), how can I make a mod like this?

Thanks!