Hello! Please, watch the video on youtube to see the rig.
It's got IK/FK chains and you can switch them. You've got stretch to play with. Footrolls work nicely.I used drivers and shape keys to do blinking. You've got controls of the lips, so you can set them and save poses if you use blender 3.0 or above.
No textures, just materials, animated with macarena dance mocap from mixamo.
Feel free to play around with that. I think video pretty much covers the rig functionality!