The only Expansion that has 1/8 Articulations is Dark Farm…and I don’t see a Bell.
So maybe a 1/8 Bell is down the road for it and the VRT or Crush Expansions
The BFD3 Core Library and most others have Bell Tip…for the HH.
Under View change to “Artics used in Groove”…when ALL is selected I remember seeing the 1/8 Bell is grayed out…when “Show Hi Hat 8ths” is selected ALL 1/8 Articulations are grayed out.
I haven’t checked the reassignments and “unknown” Lanes as I am away but I am sure someone will jump in as they are many that are more Proficient than I am with the Groove Editor.