Lost my notes after the update

Question

I use Microsoft 365 on my Android mobile device and regularly leave notes in there (by default the notes pages have a yellow background). After Microsoft 365 updated, the version changed the interface and added Copilot. Today, I opened Microsoft 365 to review my previous notes and discovered they had disappeared and could not be found anywhere, including in applications and in file management apps. The word, pdf, txt files are still there but the notes are not. How can I find my previous notes?