Par for the course for public works in Toronto.
In fairness, the trees should not even be considered for planting until the last week of September at the earliest, and I would prefer the last week of October for species appropriate for fall planting.
While I'm sure they had their fingers crossed for earlier, I don't think it was ever reasonable to hope for an opening before mid-October.
Once the plants go in and are mulched, if there are no deficiencies, the park should be able to open, there are no ownership issues that I'm aware of here, this is City property already.
However, if they miss the fall planting window; it could be late May/early June '23 to get it open.
And once it's 'done' (looks done), they're going to fence it off for at least 9 months before deigning to open it to the public (see Wellesley on the Park).
LOL, WP is a mess; but it's a relatively unusual mess in that the hold up has to do with the legal transfer of ownership of the site to the City. Not sure what the problem is..........but yes, it's taking far too long to resolve.