This approach uses the merging technique to convert the used model into its inpaint version, as well as the new InpaintModelConditioning node (You need to update ComfyUI and Manager).

Model conversion optimizes inpainting.

if you already have the image to inpaint, you will need to integrate it with the image upload node in the workflow

Inpainting SDXL model : https://huggingface.co/diffusers/stable-diffusion-xl-1.0-inpainting-0.1/tree/main/unet

Put the model in \ComfyUI\models\unet (You can rename it if you want)