Yes that is all possible. All accessible via different PIN codes. Read that some people have their ‘Kids’ profile setup with hardened permissions (not for their 3 year old but rather their own finance fun money stuff).

There are many different write-ups on Stacker News, but this is a great intro #200175. As are these entries:

GrapheneOSGrapheneOS

• A Basic Guide To Making The Switch To Graphene OS
• Curated list of useful Open Source applications for GrapheneOS
• GrapheneOS - My 2-Month Experience 📱
• GrapheneOS: Phone Privacy Protection
• Forensic companies are trying to exploit GrapheneOS - but they aren't succeeding
• Bitcoiners should use GrapheneOS instead of Android/iOS
• GrapheneOS guide on bitcoiner.guide
• How secure is GrapheneOS vs. Apple and Google
• Graphene Fixes This
• Graphene OS: Learn from my ignorance

Final tipFinal tip

Just make sure you grab Obtanium via https://github.com/ImranR98/Obtainium to download apps and avoid Google Play if you can avoid it (even with some privacy improvements there).