Inventory Blur
A simple mod for Minecraft 1.20.5+ that applies the new menu background blur to Inventories such as chests, the player inventory, etc. This should be compatible with modded inventories that extend Screen. Currently this mod is only available for Fabric, however a NeoForge version is planned to be made at some point
Resourcepack Developers
The inventory background texture is located at assets/eg-inventory-blur/textures/gui/inworld_inventory_background.png