This is a recourse pack that changes all health to look like a donut. This includes normal health, hardcore mode health, and animal health. It should work on any version but was designed for 1.19.4, so all previous versions should work so long as the gui for health hasn't been changed.
This is a GUI texture pack, there is no other files other than the "icons" file, the folders to navigate to it, the pack.mcmeta and the pack,png files.