All countries associated with the European Broacast Union can participate.
Theoretically yes, but associated members (in contrast to full members) still need to be approved on a case by case basis.
Active members (as opposed to associate members) of the European Broadcasting Union (EBU) are eligible to participate; […]. Associate member broadcasters may be eligible to compete, dependent on approval by the contest’s reference group.[49]
All countries associated with the European Broacast Union can participate.
Brazil, Peru, Japan, India, and even China and the US could participate too.
Russia and Lybia used to be part of the EBU but they were suspended. They know what they did.
Theoretically yes, but associated members (in contrast to full members) still need to be approved on a case by case basis.
https://en.wikipedia.org/wiki/Eurovision_Song_Contest#Participation