I assume it does not, because I haven't seen anyone mention this, but has MS fixed the missing Jump Lists from items pinned to Start? In an ironic twist, they are available to apps under All Apps on Start, but not to the ones you pin for fastest access. So you can do fast access to documents ONLY for apps that you have already decided don't need fast access. That seems obviously backwards.
If anyone can explain the logic behind this (maybe there's a valid reason that I had never considered), I'd also be interested in that. I suspect it's not by design at all, but just that they ran out of time before the launch of Windows 11, had other higher priorities, and for some reason it was easier to include Jump Lists for All Apps than for Pinned apps.
If this feature is in the update, I'll install it immediately, as this is my one lingering pain point with the Windows 11 UI, otherwise I'll wait a while to ensure there are no issues with the update.