Yes bfd-yang. Sometimes I would like to be wrong. When I look at this I-D, I see that it references /rt:routing/mpls:mpls/mpls:interface/mpls:config/mpls:enabled In 2018, the MPLS WG removed that /config from the mpls-base-yang so this would seem to be no longer valid. What needs changing to rectify this I have not explored.
The I-D has augment "/te:te/te:lsps-state/te:lsp" which I no longer see in draft-ietf-teas-yang-te - the -state has gone. Again, I have not explored the ramifications of this. MPLS WG has a new base-yang out this week which differentiates between an IP route with a MPLS next hop and a MPLS route with no IP, the latter forming a new, mpls Address Family. I would think that the latter is not catered for by BFD but it would be nice to be wrong Tom Petch