Thank you for contacting Lucid Motors Customer Care with this great question. Even if you have not yet received the 1.2.9 this will not cause an issue, the updates will be sent to your vehicle in the order they are to be downloaded (1.9.2 > 1.2.10).
Please rest assured you will be receiving the updates, however, if you still do not have the prompt to download the software by next week please feel free to contact Customer Care via email by responding here, or by calling us at (888) 995-8243 and we would be happy to assist.