You can craft the duplicator tree log in a crafting table by using 4 logs, 4 diamonds and a nether star (very op item)
This block will duplicate any block inside a 5x5 square just like the old orespawn mod. For the tree to grow and dupe blocks you must place it beneath dirt or grass, also, for now, you must place the blocks to duplicate next to the duplicator tree log (not diagonally). Hope you enjoy the mod and have fun.
In future updates, this mod will be ported to 1.19 and above and also to 1.16.5 if you play any modpack in that version.