I managed to get connection to the repositories. During the initial set-uo, only my local network was auto configured for ethernet.
I had to add the default gateway manually, which opened up access to the internet.
I still can't get past the 30mhz refresh rate but the Orange Pi 5 is not officially supported, so it is entirely reasonable that some functionality might not be there.
The vertical USB 2.0 port is not supported but then it is also problematic on most Linux distros.
Likewise, the USB-C data port is not detected, which is also the case with one or two other distros and full mainline support is, as I believe things, still to come.
Having some fun testing it though and it is worth other Orange Pi 5 users trying it.
Use the LibreELEC-ARMv8.aarch64-13.0-devel-20250607193042-e5590fa-rk3588-roc-pc.img image and change the config file to reflect use of the correct DTB image.