SimpleLuckyBlock was a mod made with Fabric, for version 1.20.1 of Minecraft. It works by getting a random block from the registry, and gives a random amount of it (0-64) to the player.
You can download the .jar file from the releases page.
If you would like to compile the code manually, you may also do that.
$ git clone https://github.com/FireStreaker2/SimpleLuckyBlock.git
$ cd SimpleLuckyBlock
$ ./gradlew buildThe .jar file can be found at /build/libs/ when it's done compiling.