OpenSUSE uses systemd-boot for its GRUB2 BLS implementation (<https://news.opensuse.org/2024/10/08/grub2-bls/>). It's really awesome because it lets me boot from Btrfs snapshots on a fully LUKS2 argon2id encrypted system.
>>tmtvl+(OP)
The argon2id issue remains an annoying problem (AFAIK Grub still doesn't support argon2id), but for tools like Timeshift there are Grub scripts to also boot BTRFS snapshots.