The official Nintendo Switch Parental Controls app was recently updated for mobile devices. Within the patch notes is a note that references firmware version 5.0.0 for Nintendo Switch, suggesting that a major update for the console is on the way. Here’s the part that mentions 5.0.0:
In order to use some of these features, you will need to update the Nintendo Switch system version to 5.0.0 or later.
Source: Wario64 @Wario64