How to Get the kernel-specific source or configuration of the distribution without installation

Hi，
We are studying on the default value of Kernel Configuration items in each Linux mainstream distribution.

May I ask if your distribution has the open kernel source website url(eg. git://git.launchpad.net/~ubuntu-kernel-test/ubuntu/+source/linux/+git/mainline-crackcod/mainline/v5.18-rc3) ?
Or directly the url of kernel configuration files (eg. https://github.com/KaOSx/core/blob/master/linux/config)?
Or some other public way to get your distribution's kernel-specific configuration files on different kernel versions without installation?

Thanks！