Part of this is that we've been an associate member of the EBU since 1950 with our ABC and 1979 for the SBS, the current participant broadcaster. I really don't see a good reason for it not to expand outside of Europe.
Algeria, Egypt, Jordan, Lebanon, Libya, Tunisia and Morocco are all active members of the EBU and so could decide to compete without needing to be invited.
The list of associate members that could be invited by the EBU is even longer; Bangladesh, Brazil, Canada, Chile, China, Cuba, Hong Kong, Iran, Japan, Kazakhstan, Malaysia, Mauritius, Nepal, New Zealand, Oman, South Korea and Syria. You could make it a real global affair, and a place for peace. Especially if you didn't give countries currently engaged in war a platform.