One simple command can address this question in both Java and Bedrock Edition, and can also operate on multiplayer worlds and on larger-scale servers and realms.

The Command Block in Minecraft can be placed directly on the ground and activated with any Redstone switch. Now, right-click on the block to enter the programming console.

Since this particular command can be used in a command block, you can even create dispensers that offer other players level 255 enchanted gear when they interact with the command block.