The securities firm Wedbush has reportedly written to investors advising them that Apple will find its iPhone-derived takings reduced compared to earlier estimates. They may be down by as much as 14% in 2020, and by 10% in 2021. This is related to current events that may put some customers off buying new devices.
https://www.notebookcheck.net/Apple-s-estimated-2020-iPhone-revenue-is-now-down-14-thanks-to-CoViD-19.458559.0.html