Hello,
it’s off topic question and I don’t know if that’s allowed or not 
I wish not banned for this
I have oracle cloud arm64 which I upgraded ubuntu 20.04 to 22 using command : sudo do-release-upgrade
but all third party mirrors disabled while upgrade including ( oracle ) which cause apt updates only check ubuntu
my question is : how to enable third party mirrors (oracle) again ? also if possible is there is any idea to upgrade image from OC panel itself as it’s still sticky to version 20 ?
other members please take care before upgrade so you not fall in same issue.
Note : I googled all sources including oracle itself to find how to upgrade ubuntu image without any result (only oracle linux guide available)