I have tried ‘’'cfml and ‘’'cfm but neither seems to work.
I assume that this language is not supported just yet.
If it is not created how can I create one that will work? or do I just have to wait?
Obsidian is using PrismJS for syntax highlighting in Reading mode.
You can find the full list of supported languages here: https://prismjs.com/#supported-languages
CFML is not on supported by it yet, you can create an issue/PR on its github page.