Why there is no disk settings.

not implemented https://github.com/rancher-sandbox/rancher-desktop/issues/1521

👌 thanks for information.

workaround in the issue on how to do a custom size

Just a teaser (for macOS only): in 1.7.0 we will be able to return any unused space from the VM disk back to the host filesystem when you quit the app. So deleting images will free up space on the host, and not just for reuse by other images