I think that it would be a privacy improve to have a "panic button" for the Proton Apps on mobile phone like Signal or F-Droid have via the Ripple app from Guardian Project (https://guardianproject.info/apps/info.guardianproject.ripple/). With this you would just activate the Ripple “panic button" on their app and the Proton apps that you selected would desapeare from your launcher, but they would be restored whenever you type an special code to the fake Calculator app.