An "Orthodox" Denmark, Poland, Italy, Germany and Sicily is not Orthodox Church but an Eastern Catholic Church, a Roman Catholic Church that has split with a 'Gallican' Catholic Church but reunited or remained united with the Greek Orthodoxy.
So, how is this NOT Orthodox? OK, so as opposed to "Greek Catholic" (i.e. Uniates using Eastern Liturgy, but under the Pope), we might have "Latin Orthodox".
But that's not at all given.
Given a PoD as early as 711, all Scandinavia could easily have been evangelized from Byzantium rather than Rome. As could Poland.
Sicily was already in the Byzantine rule, and probably Liturgy.
Even Germany wasn't fully RC at that point. Conversion efforts out of England were already in process, but the main conversion effort was by Charlemagne after the PoD.
The EASIEST way to get an 'Orthodox' most of Europe would be if the Synod of Whitby (664) had gone the other way, making England follow Celtic Christianity rather than allegiance to Rome. But, that's before the stated cut off date.
If some early English king decided to go with Byzantium instead of Rome (presumably over power issues) that would help. Of course, by the time England was united it's too late for the English evangelization of the continent to help with 'orthodoxification'.
Byzantine evangelists got all the way to Iceland iOTL, trying to convert people to the 'true doctrine', so if we just have them be more successful, we could get the whole north Orthodox.