Dublin have released a 3D model of the Docklands area after the data was pulled together for a recent hack event. Unfortunately it’s only available in FBX format, though I suppose it’s better than nothing. Perhaps they’ll consider CityGML or CityJSON someday. 🙏

3D Data Model Resources for Dublin Docklands SDZ - data.smartdublin.ie
Resources for the 3D Data Hack Dublin Updated Mapping and Modelling of environment from stereoscopic aerial photography dated 2018 to LOD 2. Plus buildings added to LOD3 level from various planning...