That's going to be specific to each distro whether it's possible or not. It's usually hidden in advanced partitioning, if available at all. It's like every new distro has to be completely turnkey to appeal to gamers.
I don't get why GRUB is so popular, GRUB 2 is so incredibly bloated and convoluted when it really doesn't need to be, and it's not even nice like rEFInd and other graphical bootloaders. When they started shipping GRUB 2 by default I switched to syslinux, then systemd-boot/efistub.