National League Players in Euro 2020

Which is the only one of the 24 Countries at the UEFA 2020 Euros Finals not to have any players from their National League?

16th June 2021

There are no players at the UEFA 2020 Euro Finals from the Welsh Premier League.
Finland only has 1 player from their League
Austria only have two players from their League

UEFA Euro 2020 Nations Finals Squads 
Welsh Premier League