Would it make sense to list Rombomix, and ethereum mixer? As they are somehow a replacement for tornado cash.
No, I don't list Tornado Cash. I have a history entry for it, but it's not on the list of mixers and I also don't link to it, as 1) I don't want to run into any trouble doing that and 2) it's not a Bitcoin mixer.
I don't really know how popular Ethereum mixing is compared to Bitcoin mixing, but if there is strong demand for this kind of service then it would make sense to make a table for it.