CIBC phase 1 is 100% leased, CIBC phase 2 is nearly half leased, 100 QQ (which is I assume what you mean by 'Sugar Wharf'') is more than half leased, and if by 240 Front you mean 160 Front, it is also 100% leased.
While of course no one knows for sure what will be the full medium- and long-term effects of the pandemic on office space take-up, what we do know is that going into it, the downtown office market was effectively as tight as it's possible to be, with no signs of letting up. There is loads of office in the pipeline, but more than the majority of the space in the projects that have already actually come to market is already leased.
If I had a financial stake in some of the most exciting office projects that have been announced but not yet gone to market -- The Hub, Union Centre, and 77 Wade being my personal favourites, followed in no particular order by QRC West II, Portland Commons, 58 Atlantic, Commerce Court III, 391 Adelaide W., T3 Sterling, this one, and a smattering of both smaller projects (like 540 King) and massive projects (like East Harbour) -- I'd still be feeling pretty good about things once the acute uncertainty of the next, say, 18-24 months clears, which also probably aligns with the development timelines many of those projects were on, anyway.