Settings and workflow:

Forge (and others)

Basically this needs around 2 cfg and about 30 steps. I have used the dpm++ 2M sampler with the simple sheduler in my workflow.. Euler and Heun should also work fine. Its working with Forge. I have tested it with the same settings of my workflow. In Forge you can also use the Flux realistic and Flux realistic (slow) These will give you very good results..

Comfy:

Here you can get the workflow for it: https://civitai.com/articles/8881

Important: You don't need the Flux Guidance Scale