I did as you asked. Results are about the same.
localhost:/home/jc # os-prober
107.230976 | DM multipath kernel driver not loaded
/dev/sda1:Linux Mint 22.1 Xia (22.1):LinuxMint:linux
/dev/sdb6:Ubuntu 26.04 LTS (26.04):Ubuntu:linux
localhost:/home/jc # lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 55.9G 0 part /mint
└─sda2 8:2 0 9.3G 0 part
sdb 8:16 0 931.5G 0 disk
├─sdb1 8:17 0 60G 0 part /
├─sdb2 8:18 0 1G 0 part /boot/efi
├─sdb3 8:19 0 400G 0 part /home
├─sdb4 8:20 0 75G 0 part /misc
├─sdb5 8:21 0 60G 0 part [SWAP]
└─sdb6 8:22 0 70G 0 part /ubuntu
sr0 11:0 1 1024M 0 rom
localhost:/home/jc # efibootmgr
BootCurrent: 000E
Timeout: 1 seconds
BootOrder: 000E,000B,000C,000D,0014,0017,0018,0016
Boot0005* openSUSE Boot Manager HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\SYSTEMD\SHIM.EFI)
Boot0006* Fedora HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\FEDORA\SHIM.EFI)0000424f
Boot0007* opensuse HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\OPENSUSE\GRUBX64.EFI)0000424f
Boot0008* Hard Drive BBS(HD,,0x0)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
Boot0009* CD/DVD Drive BBS(CDROM,,0x0)0000474f00004e4fb5000000010000007500410053005500530020002000200020004400520057002d003200340042003100530054002000200020006a0000000501090003000000007fff040002010c00d041030a0000000001010600030101010600010003120a000500ffff00007fff040001043e00ef47642dc93ba041ac194d51d01b4ce638004a00300044004c0043003100300039003800370039002000200020002000200020002000200000007fff04000000424f
Boot000A* UEFI:Network Device BBS(131,,0x0)
Boot000B* opensuse-secureboot HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\OPENSUSE\SHIM.EFI)
Boot000C* Ubuntu HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\UBUNTU\SHIMX64.EFI)
Boot000D* Fedora HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\FEDORA\SHIMX64.EFI)
Boot000E* openSUSE Boot Manager HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\SYSTEMD\SHIM.EFI)
Boot000F Fedora HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\FEDORA\SHIMX64.EFI)
Boot0011 Fedora HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\FEDORA\SHIM.EFI)0000424f
Boot0012 opensuse HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\OPENSUSE\GRUBX64.EFI)0000424f
Boot0013 Fedora HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\FEDORA\SHIM.EFI)0000424f
Boot0014* opensuse HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\OPENSUSE\GRUBX64.EFI)0000424f
Boot0015 Hard Drive BBS(HD,,0x0)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
Boot0016* CD/DVD Drive BBS(CDROM,,0x0)0000474f00004e4fb5000000010000007500410053005500530020002000200020004400520057002d003200340042003100530054002000200020006a0000000501090003000000007fff040002010c00d041030a0000000001010600030101010600010003120a000500ffff00007fff040001043e00ef47642dc93ba041ac194d51d01b4ce638004a00300044004c0043003100300039003800370039002000200020002000200020002000200000007fff04000000424f
Boot0017* Fedora HD(2,GPT,434be06a-6729-4f0a-9a44-715d71d72afb,0x7800800,0x219800)/File(\EFI\FEDORA\SHIM.EFI)0000424f
Boot0018* Hard Drive BBS(HD,,0x0)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
localhost:/home/jc #
the boot order seems to be different. but that’s all.