I think for now, Bitcoin remains the available mixer on the crypto economy, and there may arrive altcoins mixers in the future, The Etheruem mixer that was launched few weeks ago tuned unsuccessful.
I think that as adoptions increases, which is most likely, there is the possibility of strong altcoins mixers like Ether, Sol, mixers in my opinion. As we know on the crypto ecosystem, nothing can be rule out, and in near future, there shall be many developments.