Worlds reset after server location migration

Minecraft Support helped me to change the server location of my Realm from Europe to US West, but now all of the Worlds seem to be reset.

Each of the worlds seems to be replaced with a totally different new world, and all of the Backups are gone.

The person from Minecraft Support said that this isn't supposed to happen and told me to create a ticket.

Is there any way to get our worlds and progress back? The account where this happened is Kamina266, the Realm name is "Herberthausen", Migration should have happened at September 14, 2022.