microG EN not marked as uninstall if manually uninstalled

Summary

When the user manually uninstall the microG EN version, Apps still detect it as installed

Steps to reproduce

Confirm that microG Exposure Notification version is installed. If not, kindly install it (doc)
Now uninstall it following those steps Settings > Apps & notifications > microG Services Core, and then tap on the 3 dots button at top right and choose Uninstall updates
Now go in Apps > Categories > System apps

What is the current behavior?

There is still an Open button next to microG Exposure Notification version, which inform Apps think that the user is using microG EN version

What is the expected correct behavior?

Having the Install button next to microG Exposure Notification version

Relevant logs (adb logcat)

Relevant screenshots

Workaround

Possible fixes

Edited Dec 11, 2020 by Romain Hunault