You have lower black rock spire in the vanilla dungeon list, but there is no option for Upper black rock spire. Could you please add "upper black rock spire"

Make sure to reopen the menu after changing the settings. Is it still missing?

No, there i no option in the list for "Upper BlackRock Spire, only Lower Blackrock Spire, Take a look at this screenshot below to see the problem :

https://i.postimg.cc/qvCfdxtj/ubrs.png

Now you see what i mean ? i am running on wow classic tbc 2.5.1

Your addon is not ClassicLFG, its a different Addon. I would recommend using it, the dungeon list is complete :)