Just reporting that after running a zypper dup in TW this morning for a 400+- package upgrade, with likely new 6.8 kernel, and then running "update-bootloader" . . . that grub only "found" TW, itself only, rather than the other 6 OSs . . . . Had to run a #grub2-mkconfig command to get grub back online for all of the playmates . . . .