Cannot access ratio light

I got invitation to use ratio. I have installed ratio update/blloc services . I have installed the updates that the app given bit still I can’t find blloc launcher it the launcher settings.And it give me same update multiple times.
Device : K20 Pro

I have the issue on Xiaomi Mi 9T and Xiaomi Mi Note 10. I got the invitation to use ratio.

First, open Xiaomi Downloads app, then open Blloc Services.
Second, download the app (Ratio Light/Blloc Lines) via Blloc service, and then open the Downloads app, pause the app download.
Third, force stop Blloc service, and then resume the download on Downloads app.
Fourth, after it finished, just open it and install the apk like usual.

Repeat the same step to install other apk.