Fairphone 5 update from community build to official build, dirty sideload possible ? How?

/e/OS Devices Fairphone
2

The crux is ROMs with the prefix IMG- contain the install script. So these images are not as regular Samsung update ROMs.

You should be able to the find the OTA package … a bit like this method Feedback for v3.0 - #203 by nicofonk.