Reinstalling grub from Windows 11?

In SuSE I intalled grub on a floppy from YaST, so after a Windows reinstall I would pop it in & boot linux. No YaST here soI can’t do it easly.

Use a live USB, then chroot into the installed system, and run grub-install from there. No need for floppies.

You cannot do it from within win afaik.