It looks like this has been answered recently. How do I triple boot Windows 10, Arch Linux, and Ubuntu 18.04?
The accepted answer points to a post by edward Torvalds that resolves a kernel panic issue. I hope it helps
GRUB confuses kernels/initramfs of Ubuntu and Arch Linux installation
Boot-Repair typically adds UEFI boot entries to grub, for .efi boot files. And some systems like HP have many system utility .efi boot files in ESP. Some others have a separate FAT32 partition for those files, so less of an issue.
If Boot-Repair has added those files, they will be in a new grub script file 25_custom. You can either edit that file at will, if ...