Currently, most tools for creating Metahuman bindings on the market are for Maya. Metablriger is a Blender plugin that helps users quickly create Metahuman bindings and serves as a substitute for existing Metahuman binding tools.
Metablriger is easy to install and doesn’t rely on other plugins. It supports directly generating DNA files from the mesh of the Metahuman facial topology and loading DNA files in Blender to create facial bindings driven by controllers. It also allows users to modify facial correction shapekeys for better control over facial shapes.
Additionally, it supports body binding. Users can export both facial and body bindings as FBX files through the plugin. These FBX files can be imported into the UE5 engine to perfectly run both facial and body rigs
https://dev.epicgames.com/community/learning/tutorials/pLjG/unreal-engine-rig-custom-metahuman-character-quickly-using-blender-and-importing-ue5-tutorial