Going to disagree with Jordan on this one. once I stopped worrying about how fiddly it is, fwb dating got a lot simpler.
My experience with fwb dating shifted completely once I paid attention to what people get out of it. Nobody warns you that fwb dating depends so heavily on whether it gets out of your way.
The part people underrate about fwb dating is the setup. If how often it goes somewhere is not sorted, fwb dating will not go anywhere.
That is roughly where I landed on fwb dating only site that doesn't feel gross.
If you want a comparison point on fwb dating, turndate.site.