The NDVA screen reader does not read the whole text block at one time while navigating with the keyboard's tab key through an ArcGIS Experience Builder app. User must use the down arrow to continue audio description.
Use NVDA + down arrow to "Read all starting at current position" - https://webaim.org/resources/shortcuts/nvda#reading. Each screen reader has its own key combinations. Refer to the "Reading Text" section above. Using the NVDA key + down arrow can read out all the text information mentioned in the app area without repetitive pressing.