The only services I've seen competitors provide via LLU are ADSL, back when ADSL was still a viable competitor to cable.
But I've never seen any competitors offer service over a cable, VDSL, or other fiber network, and those are the only kinds of wired Internet service that are really viable anymore.
IIUC, cables are not subject to LLU in the UK (Virgin Media being the only cable ISP) but fibres are. Competition from fibre probably keeps cable Internet price reasonable enough.
