Supported Versions
Float-Blocks is for Minecraft Java Edition 1.19.x (1.19-1.19.3).
It will be supported for newer versions as they come out if they have different pack_version identifiers. Otherwise just use the most recent one for the most recent version.
Requires Minecraft Java Edition. Not for Bedrock Edition, and will never be for Minecraft Bedrock Edition.
Installation
After downloading the .zip archive, extract it and put the Float-Blocks-1.19.x-Version 1.0 folder in the datapacks folder of your Minecraft world, (on windows go to %appdata%/.minecraft/saves/name_of_world/datapacks)