Because the important factor is being in the European Broadcasting Area. This area is bigger than the European sub-continent and includes all countries with Mediterranean coastline and some countries to the east of Israel. Wikipedia has this helpful map:
dark green: Countries which have participated in the Contest at least once.
yellow: Countries which are eligible to participate, but have not (yet) done so.
light green: Countries which have competed in the contest as a part of another country, but never as a sovereignty.
red: Countries which were supposed to compete in the contest but withdrew right before the final.
As you can see Marokko competed one time, Tunesia and Lebanon had had at one time real plans to compete and Jordan and Irak are also eligible but opt to not participate.
Australia on the other hand isn’t eligible at all but requires a special invitation from the EBU which they have received every year for the last ten years and are likely to receive until the contest collapses.
Because the important factor is being in the European Broadcasting Area. This area is bigger than the European sub-continent and includes all countries with Mediterranean coastline and some countries to the east of Israel. Wikipedia has this helpful map:
As you can see Marokko competed one time, Tunesia and Lebanon had had at one time real plans to compete and Jordan and Irak are also eligible but opt to not participate.
Australia on the other hand isn’t eligible at all but requires a special invitation from the EBU which they have received every year for the last ten years and are likely to receive until the contest collapses.