Didn't they put an indefinite (later revised to at least 1 or 2 years for a full opening) delay in August 2018? It was due to open in December that year, surely the last few months would be finishing things up? I think there was an investigation about it because it seemed fishy saying it would be finished in mere months, only to discover a hell of a lot more needed to be done.Gravel, cracks in foundations, water etc etc
You don't know what you're going to dig through and what will happen till you actually do it.
Also covid
And yes COVID has had an effect but the issues and delays (2018) happened well before the pandemic hit.