If I try to create a new instance on Oracle Cloud, these are the options: Oracle Linux, Ubuntu, RHEL, (CentOS), Windows Server, AlmaLinux, Rocky Linux.
replyAnyway you are right, I would have switched already if Debian was available. I guess AlmaLinux could be an option to consider, since I've read in another comment that they've patched ahead of upstream for several vulnerabilities this year.
For x86_64, It's relatively easy-ish to upload your own Debian image, from Debian's generic cloud QCOW2 image, and it works just fine. I think ARM needs a bit more work if I remember correctly.
reply(But 100% agree this shouldn't be necessary).