Someone contacted EPVantage about the absence of roxadustat from their list of 2022 top sellers, and the response was they just used the numbers from analyst reports. In FGEN's case I suspect they just used the AZN projections and forgot about Astellas. They got sent the reports covering FGEN all showing sales estimates in excess of $2 billion but they didn't respond.
One issue on Botox sales - I think it very likely that Botox migraine sales will disappear over time once the CGRP drugs are approved. No idea what fraction of the market this currently constitutes.