I am still trying to get my it team to try and wipe my secure folder.   That will be the ultimate test for a single carry phone with work stuff.   Then I need to stay digging into dual sim capabilities and restrictions etc

I'm 100% sure it's done by design, but I figured I'm not the only one not to realize internet traffic was also segregated.

Best way to think about secure folder is its a seperate phone with an easy option to use the clipboard between the two.  You can also disable it as well

YSK that you will need to set up a separate VPN from within Secure Folder if you want the traffic from any of your apps inside to be encrypted.