When navigating the submission results with a screenreader (I used Voice Over) you cannot at first enter the accessible alternative to the chart ("see chart data"). If you select "see chart data" and then try get your screenreader to read it (either with tab or a read-all command) it skips to the left set of blocks. You can (eventually) get into the content by doing a series of non-intuitive tabbing back manoeuvres, but this is really fair to expect users to figure out. See example: https://drive.google.com/file/d/1AxS9ENV3x4oB-mfBm2NtttLV93fyRm1V/view?usp=sharing