This the workflow i am using to upscale my Flux1 Dev Model including a Lora for better Details

using this Lora for Fur:

https://civitai.com/models/693717/fur-detail-enhancer-add-furry-details

and this Lora for basically everything else:

https://civitai.com/models/562866/flux-image-upgrader-detail-maximizer-contrast-fix-for-low-cfg-sdxl-sd-15?modelVersionId=735063