Olovodude's Highres Flux Klein 9b

basic - t2img 2 ksamplers with a highresfix, then detailer, very good results in realistic adherence

a bit more advanced but overall better and more easily customizable is my new workflow - https://civitai.com/models/2429713/t2ii2iinpaintreference-highres-detailers-olovodudes-multi-purpose-workflow