Domino v9 and v10 are End of Life-v12 and 14 is where its at!

HCL Announcment

The End of Support (EOS) for Domino v9.0.x and v10.0.x became effective on June 1, 2024. From now on, active support will only be available to those customers with extended support agreements.

Customers must update their HCL Domino software and servers to avoid potential security issues. Doing so reduces the risk to your data security and provides you with access to the latest Domino features. Additionally, if you upgrade to HCL Nomad web client with a CCB License, you can avoid additional costs associated with upgrading the Notes desktop clients, resulting in reduced administrative expenses. Feel free to check out the latest Nomad webinar for more information.

The current versions for Domino are v12 and v14.