I understand this mod is to make GUI more informative, but as an old mc player who is nostalgic for no-hunger gameplay, I'd be happy to see an option to turn off the hunger on Easy+, or something more advanced like configurable saturation time, disable hunger loss while sprinting/regenerating and so on.
Thanks.

That is out of scope for this mod. There are other mods that do some of what you want:

• Disable hunger: https://minecraft.curseforge.com/projects/hunger-strike
• If you know how to code, then you'd be able to write a mod that configures hunger in whatever way you want using AppleCore: https://github.com/squeek502/AppleCore/wiki/Using-the-AppleCore-API