While I agree completely with the idea, I have trouble deciding how secure the 5S should be considered. I couldn’t find anywhere Apple state the level of suppor

While I agree completely with the idea, I have trouble deciding how secure the 5S should be considered. I couldn’t find anywhere Apple state the level of support, and it seems to receive some security patches but not others. Did the June update patch all known vulnerabilities at that point? Is it now insecure again since it did not receive a patch for ForcedEntry? The 6S/SE might be better examples? iOS 15 is now available on both.