Yeah, so systemd-boot it is.
That being said, it’s not like you can’t install grub after the fact, but let’s try to get systemd-boot back on your system instead. https://discovery.endeavouros.com/installation/systemd-boot/2022/12/
This link is just for reference. One moment.
Okay, was looking for this: [Tutorial] Convert to systemd-boot
Be mindful of the section about dracut or mkinit