This mod adds an armor HUD that retains Minecraft's default appearance, without the extra text and numbers, and adapts to resource packs that change the hotbar's appearance. The armor HUD can be easily configured when paired with the Cloth Config and Mod Menu mods.
If the mod hasn't been updated for the latest Minecraft version but you've found that it still works without issue, let me know with this GitHub template. (No guarantees though, since I have shifted my focus to other work.)
!Showcase of the armor HUD beside the hotbar
An aesthetic that blends right in to Minecraft's HUD
!Showcase of Slotted Armor HUD's style options
!Showcase of Slotted Armor HUD's slot options
Forked from BerdinskiyBear's Armor HUD mod, updated and with new features.
This mod can be configured with the Cloth Config and Mod Menu mods.
With these mods installed, a "Mods" button will appear on the title and pause screens, and clicking on it should show a list of installed mods. This mod should appear on that list, and hovering over it should show a button that leads to the config screen.
It can also be configured via the armor_hud.json config file with a text editor. This can be found in Minecraft's directory folder, then in the config folder.

A vanilla-like armor HUD for Minecraft!