Can't Create Ampere Instance With Ubuntu/CentOS

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Hi,

I'm trying to test out the new Ampere/ARM instances. I noticed that by default, Oracle Linux is selected and that I can also continue the creation flow with Oracle Cloud Linux. I attempted to switch the images to Ubuntu or CentOS and saw an error message:

This image has no compatible image builds for the current shape. If you select this image, a compatible shape and image build will be be auto selected.

Is this by design, and is there any way to use Ubuntu or CentOS instead of OL on the new Ampere instances?