well if you asked me in my opinion Turkish Cypriots should be able to compete in the Eurovision. Even though no country other than Turkey recognizes the TRNC TCs should be able to compete either for
1) Turkey (but then again they are, since all TRNC citizens are eligible for a Republic of Turkey passport)
2) Republic of Cyprus because according to the 1960 Constitution (that Greek Cypriots broke) the Republic stretches out to the whole of the island. So technically TCs are considered part of the Republic and should be eligible to enter.
Take Israels' song for example, a Palestinian woman entered with a Israelite and sung about peace. Why can't we do that?