Looks like she posted that she will retire from the industry in Dec 2024. So only one more year left!
https://www.cityheaven.net/osaka/A2701/A270101/club_diamond_umeda/girlid-11012724/diary/#menus
I also have a strong interest in Miyabi and plan on meeting her soon. Missed a chance recently but still on track. If you can explain more about her looks that's great but feel her type is unique and that has a huge positive on its own.