A lengthy workflow to create a 2k image with SDXL while attempting to fix faces and hands.
Download it from: https://raw.githubusercontent.com/bash-j/mikey_nodes/main/2k_face_hands_extensive.json
It uses some nodes from my https://github.com/bash-j/mikey_nodes
And nodes from the following:
https://github.com/ltdrdata/ComfyUI-Impact-Pack
https://github.com/ssitu/ComfyUI_UltimateSDUpscale
You will also need to install the yolo face and hand models and the sam models, which you can install through the manager extension.