Who knows the original smasung m21 display price in company ??

Does the Samsung Galaxy M31 support for the good lock ? i tried to install the application but it is not compatible as i think..   According to the https://www.androidauthority.com/samsung-good-lock-1079882/ this article this is from 2016 and M serie...

Once i updated to the one ui3.0 to my m31 phone,  in Google play store app updates are not showimg and it gives below error..

Does anyone use gcam for samsung m31?? If yes please be kind enough to share the link or file..Tha ks

How can i enable raw support in samsung m31 without root??My plan is install the gcam on m31