While writing the registration decline report, I tried including graphs into the report by using Quarto's cell output embedding feature. However, I could not get this to work (the graphs just would not display), so I settled for exporting each graph as an HTML file and then including each one in the report.
However, that seems to have caused another problem, as multiple people reported [WMF Slack] not being able to view the graphs in Safari on iOS, as the page failed to load with the message "an error repeatedly occurred". Theoretically, the source of the problem could be something other than the included Plotly graphs, but the reporters didn't have the problem with other Quarto reports, even those with directly-executed Plotly graphs.
The workaround would be to use directly-executed Plotly graphs, but that's not ideal as it means there will now be a significant amount of code included in the report, which makes it harder to write and harder to read (even if the code blocks are collapsed by default), and most of that code will probably be manually duplicated from the working notebooks.