If you are looking for more comprehensive UI overhauls, these options are widely used in the community:
: The gold standard for survival players. It adds a saturation overlay on the hunger bar and shows a "preview" of how much hunger and saturation a food item will restore before you eat it. Visible Saturation Indicator (Forge 1.16.5)
: While highly accurate in single-player, accuracy on servers can vary if the server uses custom hunger calculations. Popular Alternatives for 1.16.5 If you are looking for more comprehensive UI