I also doubt it's the full issue, but it is an issue that has had an impact. I think it's fair to say there are things that were out of their control, which had a flow on of them fucking up bits they did have more control of. ST and Leviathan are also totally different projects, in the same way that Rivals and Sky Voyager were different projects.
At the end of the day, the wash up will be something like 'they got hit by some totally fucked shit they couldn't do anything about, and then kicked a few own goals of their own'. You can't put that on social media, nor would you expect them to. You also can't say 'A contractor fucked something up which set the whole thing back a tonne and we fucked some other shit too', so just go to the next thing that HAS made an impact on the situation, which is covid. In previous years, managing the project the way they have, they would have made it for Easter at the very latest. That being the case, you probably can just say 'Covid' and call it a day.