Which are the centers of Hellenism in USA, Canada or Australia. Do they have TV stations in Greek language?

There are Greek Communities in all capital cities of Australia, but the largest communities by a wide margin are in Sydney and Melbourne, and Melbourne is renowned as the main Greek Community.

SBS, the national multicultural broadcaster, has been putting out Greek programming on tv and radio for decades. Radio station 3XY, a rock music mainstay in baby boomer times, has been a Greek only radio station for close to two decades now in Melbourne. There is no homegrown Greek TV channel, but satellite TV and cable TV do a brisk trade in rebroadcasting content from Greece. Antenna has the cable TV channel monopoly.