>>1534699
I use this online tool to add small details and upscale (if you can paid there's Magnific AI)
https://www.x-design.com/image-enhancer/
this one if the image is really small and blurry
https://picwish.com/unblur-image-portrait
theres others you can run if you have a good pc and basic knowhow
https://openmodeldb.info/?q=upscale

I also use these a lot to extend images
https://pixelcut.ai/ai-image-editor?tool=uncrop
https://airbrush.com/image-extender/upload
https://huggingface.co/spaces/multimodalart/flux-fill-outpaint