Hey welcome.
Tricky thing about CDs is that they’re made of polycarbonate.
Polycarbonates are a family of plastics so it’s hard to say exactly which one it is, but as a rule they’re not highly recommended as a laserable plastic. From what I recall the general gist is that they’re prone to melting.
You might like this post, particularly #4 and (if you want to keep trying)) #6. They are about material safety and how to determine good settings, respectively.
As an alternative there are many types of mirrored acrylics out there, you can google or search the forum for a lot of info.