You can, for example, make sure only key apps like the Phone app are available after a certain time at night. Screen time works across Apple computers and mobile devices, so the settings are carried across, and of course you can adapt these settings at any time as your children get older.
Microsoft
The Microsoft account you use to sign in to Windows can form the basis of a family group that also allows you to keep tabs on your kids. These features work across Windows, Android, and Xbox, and to a limited extent on iOS (again, Apple doesn’t really allow other software the necessary access to apps for phone monitoring).
In this case, there’s a bit of a muddle of old and new tools. The best place to get started is the Microsoft Family Safety website. From there you’ll be able to…