Compared to other airliners those production number are small.
Yes, of course. The version of SSJ-100 with Russian-made engines and other systems is called SJ-100.
[0] https://www.uacrussia.ru/ru/aircraft/lineup/civil/superjet-1...
We have been hearing this never-ending story of "aircraft will be available in 2 years" for a very long time. :)