There aren't even six million people in Finland. It's not like major American metropolitan cities have "Little Finland" districts. MAAAYBE in Minnesota or Michigan there is an at least semi-noteworth Finnish population. Even then, they're likely not in their late 20s or early 30s. They're children are probably in their late 20s or early 30s. More likely their grandchildren are Raanta's age. Do the Raanta's really want to hang out with the adult American children or grandchildren of Finnish immigrants? If so, the Minnesota Wild aren't really in the market for a 4+ million dollar goalie. Neither are the Toronto Maple Leafs. Detroit?
I'd think those are really the only "hotbeds" of Finnish culture in North America. Even then, it's probably equivalent to the vibrant and thriving Puerto Rican community here in Arizona. There's a handful of them, and some cool restaurants but basically just a tiny fraction of the Hispanic population of the state, which is probably >80% Mexican. I imagine even in Ontario, Minnesota, or Michigan the Swedes and Norwegians completely overshadow the Finnish population.
What about just plain NHL teams with "lots of Finns"? There are 27 Finns who have played at least 25 games in the NHL this season. Edmonton is the only team with 3 of them. Two are rookies and one is UFA. Winnipeg has 2. Carolina has 2. Minnesota has 2. Philadelphia has 2. Dallas has 2. Columbus has 2. That's it.
By comparison, Sweden has 73 NHL players with at least 25gp this season.
There aren't NHL cities with notable Finnish populations. There aren't NHL teams with notable Finnish populations. Those that have at least some Finnish representation really aren't looking for a new starting goalie.