saturation overlay and food value not visible

What versions of Minecraft, AppleSkin and AutoHUD?

version 1.20.1, appleskin v2.5.0 and autohud v6.1

Hm, I cannot reproduce that. The overlay is rendered for me, and properly sticks to the food bar as well. Given you're on AutoHUD 6.1, I assume you are on Fabric? Do you have any other mods installed?

I cannot reproduce this, even when using all of the mods you listed. The AppleSkin overlays are perfectly visible and move with the hunger bar.

I found out why. It's probably because of the client I use which is LabyMod 4. I tried it on the normal version and it works as you said. I'll try to report this bug at LabyMod.