The most needed and demanded cheat mod for Minecraft 1.16.3 X-Ray which allows you to see the resources hidden underground. This mod is quite easy to use in a single player game, and if you wish, you can configure it to work on the server.
XRay Mod (transparent textures hack) for Minecraft 1.16.3
In any case, this is a badly needed cheat that will make it easier for you to extract resources and speed up the gameplay.
In fact, many cheat functions will not be able to bring you enough resources. But only transparent textures allow you to see through the ground and stone, allowing you to contemplate all the resources. Just start the game from scratch and try to develop, now this process will take you a minimum of time.