I'm afraid I can't really give an estimate unless I know when the next update for Ren'Py will be stable. I think there may be a prerelease version now, but it's not usually a good idea to release games made with a non-stable version of the engine. I also can't be sure if the fix works until I put out the new build, since I don't have any other devices to test on.
Short version: Depends on when Ren'Py 7.4.3 comes out and whether or not it actually fixes the issue with Samsung displays.