Tip: Don’t modify GRUB_CMDLINE_LINUX_DEFAULT. Instead, add your custom entries to GRUB_CMDLINE_LINUX. That way it’s much easier to merge.
GRUB_CMDLINE_LINUX_DEFAULT="quiet udev.log_priority=3"
GRUB_CMDLINE_LINUX="resume=UUID=NUMBER_of_nvme0n1p2_ROOT_PARTITION resume_offset=NUMBER_WITH_SIX_FIGURES"