Samsung Galaxy Z Fold 7 Hardening and Tips

Hi guys I just purchased a Samsung Galaxy Z Fold 7 and I am coming from years of using Google Pixels with GrapheneOS. I decided to give the Fold 7 a try out since it benefits me more these days with my businesses I run.

What are some tips to make it hardened and secure enough for daily use?

Does Knox and Secure Folder really provide enough protection?