TNT dupers made very easy.
Place a dispenser facing downwards with an item frame holding TNT on top of it.
Whenever the dispenser gets powered by redstone, it will dispense TNT. Real simple.

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How to Install Infinity TNT (Datapack)
Infinity TNT by Pepsied is verified for Datapack, Fabric, Forge, Neoforge, Quilt across Minecraft versions 1.21, 1.21.1, 1.21.10, 1.21.11, 1.21.2, 1.21.3, 1.21.4, 1.21.5 (latest release: 1.0.0+mod, file size: 22 KB). Follow the steps below to install it safely from ModCraft.tv:
- Click the Download button above and select your Minecraft version (1.21, 1.21.1, 1.21.10, 1.21.11, 1.21.2, 1.21.3, 1.21.4, 1.21.5) and platform (Datapack, Fabric, Forge, Neoforge, Quilt).
- Make sure you have the compatible loader or environment installed for Datapack, Fabric, Forge, Neoforge, Quilt.
- Move the downloaded Infinity TNT file into your Minecraft
.minecraft/saves/<world>/datapacksfolder and launch the game.
All Versions
+ Add Version- Initial release
- Initial release