www.makemkv.com

you could try mounting the disc and running strace with vlc.
something like this :
strace -z -tt -e trace=open,openat -f vlc |& grep /media/dvd
where /media/dvd is the mountpoint
then use vlc with java menu's to start the movie to see what .mpls it opens
also make sure vlc opens the /media/dvd ...

-- thanks for adding
My submisson of
Eraser (1996) 4K Steelbook
bought in Norway and delivered pre release date.

Label: ERASER
Disc type: UHD
Disc ID: 0x59725BDD6C38A9EBB2EDF87FF2676A2C1CA89BDD
Disc dump filename: MKB20_v82_ERASER_1BC4
Drive: PIONEER BD-RW BDR-S12U
Drive firmware: 1.01 ...

My submisson of
The Da Vinci Code 20th Anniversary 4K Steelbook
bought in Norway.

-- edit: Thanks for adding.

Label: DA_VINCI_CODE_THE_EXTENDED
Disc type: UHD
Disc ID: 0xE65ED6F8F8F28EB6D349DBF4BEC9D03F541A897E
Disc dump filename: MKB20_v82_Da_Vinci_Code,_The_-_Extended_Version_60B4
Drive ...

MKB20_v82_Da_Vinci_Code,_The_-_Theatrical_Version_97DA.tgz
MKB20_v82_Da_Vinci_Code,_The_-_Extended_Version_60B4.tgz

I also submitted this to svq@makemkv.com I have to say though that
the uhd of this works in xreveal and dvdfab now.
----
Tried it in makemkv again and its now supported :D

There's a full entry in KEYDB for a "Quisling" disk too, specifically this disk ...

I also submitted this to svq@makemkv.com I have to say though that
the uhd of this works in xreveal and dvdfab now.
----
Tried it in makemkv again and its now supported