Hi and thanks for the hints:
I’m not entirely sure of the consequences of an unlocked bootloader but given the warning that appears after each start up, I’m certainly concerned.
The build version is 3.0.1-t-20250606498724-official-FP5.
When I installed e os, the Android security patch was from 5 February 2025.
And yes, I found and read the thread (answered) Install /e/ on FP5 with newer Security Patches. Unfortunately, I could not find a clear advise there either.
And the links:
… the security patch versions match (https://doc.e.foundation/devices/FP5/install)
… I followed the instructions at https://topjohnwu.github.io/Magisk/install.html
…boot.img from the FP5, I found it on the e os website, https://images.ecloud.global/stable/FP5/