I still watch Blu-ray’s on my computer. I’m most likely an exception.
Most of the free/trial stuff I used had subpar menu support (some would only even play the longest playlist). The other issue was my intent was to rip so it was useful to reference playlist numbering, and not all players made it accessible.
Sometimes I just resort to using a physical player.
It's possible to use VLC. You just have to download two files to decrypt the Blu-rays. -> https://vlc-bluray.whoknowsmy.name