When you don´t sell your white ball:
You can use the Homesh app set, then you’ll be able to keep Mi.Light running on the white ball as it is now, BUT you can control it using the Pro 2023.
Another thing you can do is actively look for a new developer/maintainer for the Mi.Light app.
I assume Athom would be so kind to transfer the app instead of just leave it be.
N.B. what is the homey.app store URL of the Mi.Light app?
Can’t find it.