Loom
Anvil
Hotbar
Beacon
Advancements
Screenshots taken in 1.16 but it should work in 1.17 when optifine fixes Custom GUIs
Chest / Barrel / Ender Chest
Loading screen
Settings screens
Book / Lectern
All GUIs are dark not just the ones shown in the images
Enchanting Table
Survival mode inventory
Creative mode inventory