Summary (taken from the original page):
"This mod adds an Armor Toughness bar that shows up above the hunger bar and supports multiple levels up to 100+. It is recommended, but not required that this mod is used with Attribute Fix, otherwise nothing above 20 will be displayed due to vanilla capping the attributes."
This mod is a port of the mod Armor Toughness Bar which still isn't updated to 1.18.2 forge. Nothing is changed since this is just a port.
Example:
