Hello Jaime Dominguez Cobo,
The landscape wide upgrade of ByDesign systems are planned in phases. It might have so happened that the partner tenant cam in the earlier cycles and customer systems might soon be upgraded.
Please note that the test tenants are planned for upgrade earlier than the productive tenants.
If you can specify the URLs of your partner as well as customer tenants, I can help you with the exact dates of the upgrades planned.
Thank you.
Regards,
Suraj