This is an absolute essential. It is part of every professional pipeline. I have seen this feature requested in interviews and comment sections for years. Inexplicably, it appears to have been completely removed from the roadmap. All of TM's direct and indirect competitors have this feature. That's, not a coincidence.
Until this is implemented, TM is nothing more than a toy for my team. Not every project will take advantage of TM's headline features. But every project needs to export still images and retouch them in PS. We can't justify building a project in TM if we also have to build it in another program for still renders. Many of my peers in architecture and design feel the same. We're excited by some of the features that TM brings to the table. But, we can't adopt it if it lacks this basic functionality.
Perplexingly, this seems like such an easy feature to add. Most of the standard render passes are already being calculated under the hood, in the engine. It should be relatively straightforward to add a way to export these. The cost-benefit ratio here is off the charts. If you want industry adoption, please give the industry the tools they need to use your software in their existing workflow.