In reply to basicD.

CPT and taxonomy templates are 100% supported and have been since block-based theme support shipped with WordPress 5.9. The template hierarchy is exactly the same. In fact, we are using both an archive-podcast.html and single-podcast.html template right here on WP Tavern. Check them out via our podcasting page.

This puts that piece of theme building entirely on par with classic WordPress.

Presumably, you are referring to creating these templates directly from the site editor, which was an impossible task in the classic era since such a feature did not exist. It should be noted that the site editor is still in beta and is merely one component of FSE. It is the UI that will eventually allow creating entire themes from the WordPress admin. It's getting closer, but it is not quite where it needs for some of the more advanced usages.

But, there is good news. WordPress 6.0 is shipping a handful of new templates that can be added via the site editor. This is a necessary foundational step before building out the UI for creating custom templates for post types and taxonomies. There is ongoing work to make this happen, and I expect that we will see something like this land in WordPress 6.1. This is new territory, so it's going to take a little time to flesh out the user experience.