Folks, here's an NVDA add-on dev question (wxPython / accessibility).

Folks, here's an NVDA add-on dev question (wxPython / accessibility). Please kindly boost for visibility.
I’m building an NVDA add-on with a lookup dialog that shows dictionary results. I tried embedding HTML inside the dialog (wxPython wx.html.HtmlWindow / wx.html2.WebView). NVDA often announces only “HTML window”, doesn’t read the content, and browse-mode features like NVDA+Space and single-letter navigation (e.g., H / Shift+H) don’t work reliably. Is there any recommended way to keep HTML content inside the same dialog (not opening a separate browseable message/window) while still making it accessible to NVDA—i.e., content is readable and (ideally) supports browse-mode style navigation? Any patterns, APIs, or known working approaches would be appreciated.
@NVAccess