Code that used to render no longer is displaying anything for sp-popover. And the examples from https://opensource.adobe.com/spectrum-web-components/components/popover won’t show either. Not sure if there is some required CSS missing from that demo or some other change.
When I downgrade to PS v22.2, the popover does show. So there is definitely a change in how UXP is rendering lately.
Is there any other demo code that is known to work with the latest versions of PS? I don’t see anything in other places like the “kitchen sink”