This datapack brings 5 TNTs and a TNT Launcher into the game without the usage of mods. The aftermath of the explosions generate an irregular sphere for some randomness. This is also a creative only datapack so there are no crafting recipes for the items.
(Radius: 20) 
(Radius: 40)
(Radius: 80)
(Radius: 160) Will display a text warning and the progress completion during the explosion process.
(Radius: 320) Will display a text warning and the progress completion during the explosion process.
On: Reloads the selected TNT in the offhand slot without a delay. This option also doesn't remove any TNTs from the hotbar in survival mode.
Off: Reloads the selected TNT in the selected item slot with the TNT launcher in the offhand. Removes one TNT everytime the launcher has been reloaded in survival mode.
On: Destroys every block in the game and fills everything in the radius with air.
Off: Destroys all blocks that are not under the (#wither_immune) tag such as bedrock, command blocks, etc.
I plan to add one more TNT that allows custom radii (if I am able to figure this out), but I won't add any more TNTs other than that. I want to keep this a simple mod designed for destructive purposes only. But feel free to make a copy and add more custom TNTs on your own.
With the changes of function execution in 1.20.3, this made the explosion progress completion display after the explosion finishes. If you are able to find a fix to this problem, feel free to join my discord and message me there.
Thanks to Kalendarz2 for the original datapack and method to generate spheres without mods.
Original Datapack: https://minecraftmapy.pl/mapa/EeTP7d
