Lithuania is overwhelmingly Catholic. Estonia and Latvia are mixed Lutheran, Catholic, and Orthodox (as witnessed by the supposedly fictitious “Latvian Orthodox Church” in an episode of Seinfeld, which, as it turns out, actually exists!)
In the Protestant monastery near where I live (in Western Switzerland), a lot of the novices and younger sisters, most of whom land here through a first contact with the community in Taizé, are from Central Europe, Scandinavia or Baltic countries.
In the US paganism occasionally flared up, especially a few decades ago, mostly as an ostentatious reaction against the then-strong Christian culture. I never saw anything like what I read about ancient pagan religion.
We have a few here, although exclusively feminine. Post-Vatican II ecumenism had the (positive, I think) effect of making historical Protestant traditions realize they might have thrown out the baby with the bathwater when they emptied the monasteries.
Protestant churches are still waiting for their masculine orders, though. Protestant men with a monastic vocation mostly go to Taizé or Bose, both ecumenical communities, or become hermits.
There is no reason, in the nature of things, why Protestants could not have monastic communities that seek to follow perfectly the evangelical counsels of poverty, chastity, and obedience. However, as a general rule, the more conservative evangelicals (Baptists, Pentecostals, Holiness et al) just make the assumption that everybody gets married and, if nature permits, have children. I have to wonder how comfortable a church home they are for involuntarily same-sex-attracted people who choose to obey the Scriptures and live celibately, rather than offend God by practicing sodomy. “Back in the day” many of them just went ahead and got married, possibly taking their SSA to the grave with them.
Yes. In fact, some historians argue that the Protestant reformation did not so much empty the monasteries as turn whole societies into communities of sorts, regulated by a common set of rules, where marriage and family life were seen as the main path to holiness.