The lucky countries are, among others, Poland, Switzerland, France, Netherlands and Slovakia. Update has a code number G965FXXUU7DTAA and weights 1779,05 MB. It contains all the functions and utilities of Android 10 with One UI 2.0. As usual, the update is released in waves: it might be that your friend already receives it but you will have to wait a few days longer.
We do not know when will the update reach other countries, but it should be soon.