Some sensors which were supported in the now retired Java version of the app, are missing in the Flutter version.
An APK of the old Java version can be downloaded from https://github.com/fossasia/pslab-app/releases/tag/v3.2.17
The code of the old java version can be found at https://github.com/fossasia/pslab-app/tree/development
Some sensor screens were not working as expected in the old version. I tried to track this in #2594
They should be implemented. I will create sub-tickets for each instrument.