Commands:

/trigger configure_satb - Opens the personal configuration chatmenu, where you can activate or deactivate the bar display individually for yourself.
/function satb:configure - Opens the operator settings. Can enable and disable global settings (force settings for everyone) and activate or deactivate the bar display individually for everyone.

Bars Info:

Saturation Bar: It shows how much food is left before the player's food starts to decay. It is like a secondary hunger bar.
Exhaustion Bar: Shows how long it takes for the food bar or saturation to decrease by one.
Armor Toughness Bar: Explaining armor toughness is a bit complicated, but basically is an extra resistence. You can see more information here.

Resourcepack:
This datapack needs a resourcepack to work. All players that are playing must have the resourcepack installed.
What the resourcepack changes:
- Add new fonts to the game.
- Add new translations for EN_US and PT_BR languages (for the chatmenu)
these changes are only noticeable using the datapack. does not change any game resource.

Incompatibility:
This datapack uses the actionbar constantly, and therefore may be incompatible with various datapacks.
The resourcepack is incompatible with the 1.18 H4 optifine not tested in later versions due to a bug with optifine itself. I have already opened a report on their github.