grub-mkconfig - one Linux kernel, multiple boot entries with different kernel options

GRUB version: 2.04-20 One Linux kernel only; I need to have two GRUB entries to boot the kernel with different set of kernel options. For the time being, after each grub-mkconfig or update-grub2 which produces one entry with GRUB_CMDLINE_LINUX_DEFAULT options, I manually add another one with the different set. Is there any way to get two entries of the same kernel with different kernel options (one respecting GRUB_CMDLINE_LINUX_DEFAULT plus another one) after running grub-mkconfig or update-grub2? I suppose some custom script in /etc/grub.d? Added bonus, proper way to disable os-prober? For the time being, I've renamed os-prober script so that it's not found.