RTX A3000 6GB laptop not available in profile list of posssible GPUs

The hardware selection options are managed openly on GitHub, so you can add new ones (by submitting a PR or raising an issue). (Conversely, unless someone adds it, it stays as-is basically … )

As a temporary workaround, finding and selecting an nVidia GPU with roughly the same VRAM capacity might not cause too much inconvenience.