Except more obvious Russia or Norway/Sweden, I can`t remember any european country where it is as popular. The level of the domestic championships are low, as the best players go abroad to test their skills, and the rest are really near to trash.
Being a fan of sports betting, sometimes I bet on some Russian or Ukranian hockey, just on those favourites. It`s a little boring to watch, so I use sites like https://777score.com/ to pick the nesessary matches, look for statistics or learn the schedule of the following games, they are really good at that.