M365 Copilot Suggested Prompt button issue

I am experiencing the same issue in my organization. The Prompt Gallery/Suggested Prompts button is no longer visible above the chat input box after a conversation has started in M365 Copilot.

For usability and prompt reusability purposes, it is important that this button remains visible for our organization after the first request is sent to the agent, allowing end users to easily access sequences of suggested prompts without having to return to the Copilot landing page.