Thanks for reaching out! I understand the importance of being up to date on your calendar. I would be more than happy to help answer this question.
Unfortunately, the Google Assistant only reads the first 3 scheduled events. I appreciate you sharing your feature request. I recommend sharing your feedback and idea through the Google Home App or device. Here are the steps to sending in feedback.
I apologize for the inconvenience caused by this feature. Please let me know if there is anything else I can help with.