I’m afraid blurays are to be discarded. Consult this:
https://packages.debian.org/buster/libbluray2,
especially note:
NB: Most commercial Blu-Ray are restricted by AACS or BD+ technologies and this library is not enough to playback those discs.
After installing these bluray* packages, VLC might be able to play your discs.
If it does not play them, throw those discs away and never buy a bluray disc again…