Seems to they are back , or at least going to be back.
https://twitter.com/sonmdevelopment/status/1309406610079526912?s=20
However there is from September and no more important update since then
Quote
Thank you for your trust. After a long freezing stage, SONM goes to active development and transformation stage.
Big things Coming Soon !
Big things Coming Soon !
https://twitter.com/sonmdevelopment/status/1309406610079526912?s=20
However there is from September and no more important update since then