Thanks for the fast reply.
I was looking at the official post of the World Quest...
https://pokemonrevolution.net/forum/topic/121457-world-quest-and-mysterious-island/
https://pokemonrevolution.net/forum/topic/172302-2021-world-quest-birth-island-updated/
...and there is no mention about getting the rewards when switching servers. I understand that it may be obvious to almost everyone, but it was not for me.
I play again PRO after almost 4 years. I have been playing only 2 months and this is the first WQ that i have successfully completed. I did not know this event existed.
I see that you cannot solve my problem. But it seems unfair to me because you can verify that I did the quest on the other server, giving 3 hours of my life. It seems like an unhappy decision to have to wait for the free transfer to be able to receive the reward, and then? I have to wait 1 more month to return free to Silver again...
I also want to express that i was never certain about when the rewards were given (they were announced almost 3 weeks later).
Is pretty obvious to say that if i had the knowledge that i would lose the reward, i would never have transferred my account.